Patents by Inventor Takeshi Mita

Takeshi Mita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20110251398
    Abstract: A 3,5-Bis (substituted aryl) substituted isoxazoline compound of formula (2) or a salt thereof: wherein A1 is a carbon atom or nitrogen atom; X1 is selected from the group consisting of a halogen atom, —SF5, C1-C6haloalkyl, hydroxy C1-C6haloalkyl, C1-C6alkoxy C1-C6haloalkyl, C1-C6haloalkoxy C1-C6haloalkyl, C3-C8halocycloalkyl, C1-C6haloalkoxy, C1-C3haloalkoxy C1-C3haloalkoxy, C1-C6haloalkylthio, C1-C6haloalkylsulfinyl and C1-C6haloalkylsulfonyl; X2 is selected from the group consisting of a halogen atom, cyano, nitro, C1-C6alkyl, C1-C6haloalkyl, —OR5, —OSO2R5 and —S(O)rR5; Y is selected from the group consisting of a halogen atom, cyano, nitro, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy, C1-C6alkylthio, C1-C6haloalkylthio, C1-C6alkylsulfonyl, C1-C6haloalkylsulfonyl, —NHR7 and —N(R7)R6; R is selected from the group consisting of a halogen atom, cyano, nitro, —NH2, halosulfonyloxy, C1-C6alkylsulfonyloxy, C1-C6haloalkylsulfonyloxy, phenylsulfonyloxy, phenylsulfonyloxy substituted with (Z)p1 and
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takeshi MITA, Takamasa KIKUCHI, Takashi MIZUKOSHI, Manabu YAOSAKA, Mitsuaki KOMODA
  • Publication number: 20110242280
    Abstract: According to one embodiment, a parallax image generating apparatus is for generating, using a first image, a parallax images with a parallax therebetween. The apparatus includes following units. The first estimation unit estimates distribution information items indicating distributions of first depths in the first image by using first methods. The distribution information items falls within a depth range to be reproduced. The first combination unit combines the distribution information items to generate first depth information. The second calculation unit calculates second depth information indicating relative unevenness of an object in the first image. The third combination unit combines the first depth information and the second depth information by using a method different from the first methods, to generate third depth information. The generation unit generates the parallax images based on the third depth information and the first image.
    Type: Application
    Filed: September 23, 2010
    Publication date: October 6, 2011
    Inventors: Nao Mishima, Takeshi Mita, Kenichi Shimoyama, Ryusuke Hirai, Masahiro Baba
  • Patent number: 8022089
    Abstract: An isoxazoline-substituted benzamide compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., X is halogen atom, C1-C6haloalkyl, etc., Y is halogen atm, C1-C6alkyl, etc., R1 is C1-C12alkyl arbitrarily substituted with R16, C3-C12alkenyl, arbitrarily substituted with R16 is oxygen atom or sulfur atom, —N(R20)R19, etc., R2 is hydrogen atom, C1-C4alkoxy C1-C6alkyl, etc., R3 is C1-C6haloalkyl, etc., R16 is halogen atom, cyano, phenyl substituted with (Z)p1, D-1 to D-60, E-1 to E-49, etc., R19 is phenyl, phenyl substituted with (Z)p1, etc., R20 is hydrogen atom, C1-C6alkyl, etc., Z is halogen atom, nitro, C1-C4alkoxy, etc., D-1 to D-60 are 5- or 6-membered aromatic heterocyclic rings, E-1 to E-49 are 5- or 6-membered saturated heterocyclic rings, m is an integer of 0 to 5, n is an integer of 0 to 4, p1 is an integer of 1 to 5. The pesticide containing these compounds.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: September 20, 2011
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takeshi Mita, Takamasa Kikuchi, Takashi Mizukoshi, Manabu Yaosaka, Mitsuaki Komoda
  • Publication number: 20110181593
    Abstract: According to an embodiment, an image processing apparatus includes an acquisition unit, a setting unit, a transform unit and a generation unit. The acquisition unit is configured to acquire a parallax value of each pixel of a plurality of images having a parallax. The setting unit is configured to set at least one reference range within a range of the parallax value. The transform unit is configured to apply transform to the parallax value of each pixel so as not to change a parallax value belonging to the reference range but to change a parallax value that does not belong to the reference range without changing a magnitude relationship between the parallax values of the pixels. The generation unit is configured to generate a parallax image from the image based on the parallax values after applying the transform.
    Type: Application
    Filed: January 27, 2011
    Publication date: July 28, 2011
    Inventors: Ryusuke HIRAI, Takeshi MITA, Nao MISHIMA, Kenichi SHIMOYAMA, Masahiro BABA
  • Publication number: 20110172414
    Abstract: A pesticide, particularly an insecticide or an acaricide, including a substituted isoxazoline compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., L is —N(R2c)—, or —CH(R2a)N(R2c)—, etc., X is halogen atom, C1-C6 haloalkyl, etc., Y is halogen atom, C1-C6alkyl, etc., R1 is —C(O)R1a, —C(O)OR1a, —C(O)NHR1a, etc., R2 is hydrogen atom, C1-C6haloalkyl, —C1-C4alkoxy C1-C4alkyl, cyano C1-C6alkyl, C3-C6alkenyl, C3-C6alkynyl, —C(O)R15, —C(O)OR15, etc., R3 is C1-C6haloalkyl, etc., m is an integer of 0 to 5, n is an integer of 0 to 4. The pesticide containing these compounds.
    Type: Application
    Filed: March 28, 2011
    Publication date: July 14, 2011
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takeshi MITA, Kazushige MAEDA, Mitsuaki KOMODA, Eitatsu IKEDA, Ken-ichi TOYAMA, Motoyoshi IWASA
  • Patent number: 7965339
    Abstract: A resolution enhancing method of a video includes reducing a training video, extracting a high-frequency component from the training video, calculating a first feature vector including a feature amount of a first spatio-temporal box in the reduced video, storing pairs of the first feature vectors and second spatio-temporal boxes in the high-frequency component videos at the same positions as those of the first spatio-temporal boxes, expanding an input video, retrieving a first feature vector similar to a second feature vector including a feature amount of a third spatio-temporal box of an object of the input video to be processed, as an element, and adding a second spatio-temporal box making a pair with the retrieved first feature vector to a fourth spatio-temporal box in the expanded video at the same position as that of the third spatio-temporal box in order to generate an output video.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: June 21, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasunori Taguchi, Takashi Ida, Toshimitsu Kaneko, Nobuyuki Matsumoto, Takeshi Mita, Hidenori Takeshima, Kenzo Isogawa
  • Publication number: 20110144334
    Abstract: An isoxazoline-substituted benzamide compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., W is oxygen atom or sulfur atom, etc., X is halogen atom, C1-C6haloalkyl, etc., Y is halogen atom, C1-C6alkyl, etc., R1 is —CH?NOR1a, —C(O)OR1c, —C(O)NHR1d, phenyl substituted with (Z)p1, D-14, D-52, D-53, D-55 to D-59, etc., R1a is C1-C6alkyl, etc., R1c is C1-C6alkyl, etc., R1d is hydrogen atom, —C(O)R15, —C(O)OR15, etc., R2 is C1-C6alkyl, —CH2R14a, C1-C6alkynyl, —C(O)R15, —C(O)OR15, etc., further when R1 is —CH?NOR1a, —C(O)OR1c or —C(O)N(R1e)R1d, R2 may be hydrogen atom, R3 is C1-C6haloalkyl, etc., R14a is cyano, —OR25, etc., R15 is C1-C6alkyl, C1-C6haloalkyl, C1-C4alkoxy C1-C4alkyl, C1-C4alkylthio C1-C4alkyl, C3-C6cycloalkyl, C2-C6alkenyl, etc., R25 is C1-C4alkyl, C1-C4haloalkyl, —C(O)R32 or —C(O)OR32, etc., R32 is C1-C6alkyl or C3-C6cycloalkyl, etc., Z is halogen atom, cyano, nitro, C1-C6alkyl, C1-C6alkoxy, etc.
    Type: Application
    Filed: January 20, 2011
    Publication date: June 16, 2011
    Applicant: Nissan Chemical Industries, Ltd.
    Inventors: Takeshi MITA, Yuki Furukawa, Ken-ichi Toyama, Manabu Yaosaka, Eitatsu Ikeda, Yoshihide Masuzawa, Mitsuaki Komoda
  • Patent number: 7951828
    Abstract: An isoxazoline-substituted benzamide compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., W is oxygen atom or sulfur atom, etc., X is halogen atom, C1-C6haloalkyl, etc., Y is halogen atm, C1-C6alkyl, etc., R1 is —CH?NOR1a, —C(O)OR1c, —C(O)NHR1d, phenyl substituted with (Z)p1, D-14, D-52, D-53, D-55 to D-59, etc., R1a is C1-C6alkyl, etc., R1c is C1-C6alkyl, etc., R1d is hydrogen atom, —C(O)R15, —C(O)OR15, etc., R2 is C1-C6alkyl, —CH2R14a, C1-C6alkynyl, —C(O)R15, —C(O)OR15, etc., further when R1 is —CH?NOR1a, —C(O)OR1c or —C(O)N(R1e)R1d, R2 may be hydrogen atom, R3 is C1-C6haloalkyl, etc., R14a is cyano, —OR25, etc., R15 is C1-C6alkyl, C1-C6haloalkyl, C1-C4alkoxy C1-C4alkyl, C1-C4alkylthio C1-C4alkyl, C3-C6cycloalkyl, C2-C6alkenyl, etc., R25 is C1-C4alkyl, C1-C4haloalkyl, —C(O)R32 or —C(O)OR32, etc., R32 is C1-C6alkyl or C3-C6cycloalkyl, etc., Z is halogen atom, cyano, nitro, C1-C6alkyl, C1-C6alkoxy, etc.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: May 31, 2011
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takeshi Mita, Yuki Furukawa, Ken-ichi Toyama, Manabu Yaosaka, Eitatsu Ikeda, Yoshihide Masuzawa, Mitsuaki Komoda
  • Patent number: 7947715
    Abstract: There is provided a novel pesticide, particularly an insecticide or an acaricide. A substituted isoxazoline compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., L is —CH2—, —C(CH3)—, —CH(CN)—, etc., X is halogen atom, C1-C6haloalkyl, etc., Y is halogen atom, C1-C6alkyl, etc., R1 is —C(O)R1a, —C(O)OR1a, —C(O)NHR1a, etc., R2 is hydrogen atom, C1-C6haloalkyl, —C1-C4alkoxy C1-C4alkyl, cyano C1-C6alkyl, C3-C6alkenyl, C3-C6alkynyl, —C(O)R15, —C(O)OR15, etc., R3 is C1-C6haloalkyl, etc., m is an integer of 0 to 5, n is an integer of 0 to 4. The pesticide containing these compounds.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: May 24, 2011
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takeshi Mita, Kazushige Maeda, Mitsuaki Komoda, Eitatsu Ikeda, Ken-ichi Toyama, Motoyoshi Iwasa
  • Publication number: 20110059988
    Abstract: This invention relates to methods for controlling parasitic infestations of animals and their environments, and, more particularly, to methods using isoxazolines to control parasites in or on animals or in their environments, as well as treat parasitoses of animals. The isoxazolines include 4-(isoxazolinyl)-benzamides (specifically, substituted 4-(5-(halomethyl)-5-phenylisoxazolin-3-yl)-benzamides) and 4-(isoxazolinyl)-benzothioamides (specifically, substituted 4-(5-(halomethyl)-5-phenyl-isoxazolin-3-yl)-benzothioamides). This invention also relates to compositions comprising the isoxazolines for use in such methods, the use of the isoxazolines to make medicaments for use in such methods, and kits comprising the isoxazolines for carrying out such methods. This invention further relates to the use of the isoxazolines as medicaments, particularly medicaments that can be used in the above-referenced method.
    Type: Application
    Filed: August 15, 2008
    Publication date: March 10, 2011
    Inventors: Anja Regina Heckeroth, Jürgen Lutz, Christina Mertens, Heike Williams, Hartmut Zoller, Takeshi Mita
  • Publication number: 20110009438
    Abstract: There is provided a novel pest control agent, particularly an insecticide or miticide. A substituted isoxazoline compound of General Formula (1): where A1, A2 and A3 independently are CH or N, etc., X1, X2 and X3 are independently are H, a halogen atom, etc., Y1 is H, etc., R1 is —C(O)R1a, —C(S)R1a, R1a is —C(R9)(R9a)—S(O)rR10, —C(R9)(R9a)—S(O)t(R10)?NR11, etc., R2 is H, etc., R3 is CF3, CClF2, etc., R4 is H, etc., R9 is H, etc., R9a is H, etc., R10 is C1-2 alkyl, etc., R11 is H, etc., r is an integer of 0-2, t is an integer of 0 or 1; and a pest control agent comprising the compound or the salt thereof.
    Type: Application
    Filed: September 10, 2008
    Publication date: January 13, 2011
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takeshi Mita, Kazushige Maeda, Youko Yamada, Eitatsu Ikeda, Ken-ichi Toyama, Mitsuaki Komoda
  • Publication number: 20100298558
    Abstract: There is provided a novel pest control agent, particularly an insecticide or miticide. A substituted dihydroazole compound of General Formula (1) or a salt thereof: where A1, A2, A3 and A4 are independently C—Y or N, A5 is —CH2—, etc., G1 is a benzene ring, etc., G2 is G2-1, G2-6, G2-9, etc., X is a halogen atom, C1-2haloalkyl, etc., Z is methyl, —NH2, etc., R1 is —C(O)R1a, etc., R1a is C1-4alkyl, etc., R2 is H, C1-4alkyl, etc., R3 is C1-2haloalkyl, etc., R4 is H, cyano, methyl, etc., m is an integer of 1, 2, 3, etc., n is an integer of 0 or 1; and a pest control agent comprising the compound or the salt thereof.
    Type: Application
    Filed: December 5, 2008
    Publication date: November 25, 2010
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takeshi Mita, Eitatsu Ikeda, Hiroaki Takahashi, Mitsuaki Komoda
  • Publication number: 20100144808
    Abstract: Disclosed is a novel pest control agent, in particular a pesticide or a miticide. Specifically disclosed are a substituted isoxazoline compound or a substituted enone oxime compound represented by the general formula (1) below or the general formula (2) below, and a pest control agent containing any of them. (In the formulae, the symbols are as defined in the description.
    Type: Application
    Filed: June 27, 2008
    Publication date: June 10, 2010
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takeshi Mita, Kenichi Toyama, Yuki Furukawa, Mitsuaki Komoda
  • Publication number: 20100144797
    Abstract: Novel pest control agents, particularly insecticides or miticides are provided. Isoxazoline-substituted benzamide compounds of General Formula (1) or a salt thereof: (where A1, A2 and A3 are independently C or N, G is a benzene ring, etc., Q is a structure of Q-1, Q-2 or Q3: (where, for example, R1 in Q-1 is a C1 to C4 haloalkyl, etc., and R2 is H, etc., R1 in Q-2 is —OR1a, etc., R1a is a C1 to C4 alkyl, etc., and R2 is H, etc.), W is O or S, X is a halogen atom, a C1 to C2 haloalkyl, etc., Y is a halogen atom, a C1 to C2 alkyl, etc., R3 is a C1 to C2 haloalkyl, etc., m is an integer of 1-3, etc., and n is an integer of 0 or 1, etc.), and pest control agents containing the compounds.
    Type: Application
    Filed: March 6, 2008
    Publication date: June 10, 2010
    Inventors: Takeshi Mita, Yuki Furukawa, Motoyoshi Iwasa, Mitsuaki Komoda
  • Patent number: 7662972
    Abstract: An isoxazoline-substituted benzamide compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., X is halogen atom, C1-C6haloalkyl, etc., Y is halogen atom, C1-C6alkyl, etc., R1 is C1-C12alkyl arbitrarily substituted with R16, C3-C2alkenyl, arbitrarily substituted with R16 is oxygen atom or sulfur atom, —N(R20)R19, etc., R2 is hydrogen atom, C1-C4alkoxy C1-C6alkyl, etc., R3 is C1-C6haloalkyl, etc., R16 is halogen atom, cyano, phenyl substituted with (Z)p1, D-1 to D-60, E-1 to E-49, etc., R19 is phenyl, phenyl substituted with (Z)p1, etc., R20 is hydrogen atom, C1-C6alkyl, etc., Z is halogen atom, nitro, C1-C4alkoxy, etc., D-1 to D-60 are 5- or 6-membered aromatic heterocyclic rings, E-1 to E-49 are 5- or 6-membered saturated heterocyclic rings, m is an integer of 0 to 5, n is an integer of 0 to 4, p1 is an integer of 1 to 5. The pesticide containing these compounds.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: February 16, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takeshi Mita, Takamasa Kikuchi, Takashi Mizukoshi, Manabu Yaosaka, Mitsuaki Komoda
  • Publication number: 20090312330
    Abstract: An isoxazoline-substituted benzamide compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., X is halogen atom, C1-C6haloalkyl, etc., Y is halogen atm, C1-C6alkyl, etc., R1 is C1-C12alkyl arbitrarily substituted with R16, C3-C12alkenyl, arbitrarily substituted with R16 is oxygen atom or sulfur atom, —N(R20)R19, etc., R2 is hydrogen atom, C1-C4alkoxy C1-C6alkyl, etc., R3 is C1-C6haloalkyl, etc., R16 is halogen atom, cyano, phenyl substituted with (Z)p1, D-1 to D-60, E-1 to E-49, etc., R19 is phenyl, phenyl substituted with (Z)p1, etc., R20 is hydrogen atom, C1-C6alkyl, etc., Z is halogen atom, nitro, C1-C4alkoxy, etc., D-1 to D-60 are 5- or 6-membered aromatic heterocyclic rings, E-1 to E-49 are 5- or 6-membered saturated heterocyclic rings, m is an integer of 0 to 5, n is an integer of 0 to 4, p1 is an integer of 1 to 5. The pesticide containing these compounds.
    Type: Application
    Filed: July 27, 2009
    Publication date: December 17, 2009
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takeshi Mita, Takamasa Kikuchi, Takashi Mizukoshi, Manabu Yaosaka, Mitsuaki Komoda
  • Patent number: 7593037
    Abstract: An imaging device includes: a capturing unit that captures a motion picture at one of a plurality of frame rates; a buffer that temporary stores the motion picture captured by the capturing unit; a signal generation unit that generates a signal used for specifying a core frame that is to be subjected to a resolution enhancement processing, while the capturing unit captures the motion picture at a first frame rate; a capturing control unit that controls the capturing unit to capture the motion picture, after the core frame specified by the signal, at a second frame rate that is higher than the first frame rate; a reference frame determination unit that determines a frame stored in the buffering unit at the second frame rate as a reference frame; and an image processing unit that performs the resolution enhancement processing by converting the core frame into a high-resolution frame by reference to the reference frame determined by the reference frame determination unit.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: September 22, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyuki Matsumoto, Takashi Ida, Takeshi Mita, Hidenori Takeshima, Yasunori Taguchi, Kenzo Isogawa
  • Patent number: 7555494
    Abstract: A method and apparatus for reproducing metadata provides a data structure in which metadata whose preferential reproduction is desired can be selected and reproduced. The metadata relevant to a moving image includes a stream data structure including one or more access units each being a data unit which can be independently processed, and each of the access units includes first data to specify an effective period defined with respect to a time axis of the moving image, object area data describing a spatio-temporal region in the moving image, second data including one of or both of data to specify a display method relevant to the spatio-temporal region and data to specify a processing to be performed when the spatio-temporal region is specified, and third data to specify, in a case where one or more access units exist on a same screen in the moving image at a time of reproduction of the metadata, reproduction priority of each of the access units.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: June 30, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyuki Matsumoto, Takashi Ida, Toshimitsu Kaneko, Yoshihiro Ohmori, Takeshi Mita, Koji Yamamoto, Koichi Masukura, Hidenori Takeshima, Yasunori Taguchi, Kenzo Isogawa
  • Publication number: 20090161992
    Abstract: An image resolution increasing method include setting a first block which is included in a low resolution image and is located at a first position, and a second block which is included in a high resolution image and is located at a second position, and setting, as an increasing resolution block of the first block, a third block expressed by a second vector obtained by projecting a first vector representing the second block to a linear manifold as a set of vectors that indicate fourth blocks of the second block size, the fourth blocks becoming the first block due to reduced resolution, in a Euclidean space having, as the number of dimensions, a product of the number of pixels arranged vertically in the second block size and the number of pixels arranged horizontally in the second block size.
    Type: Application
    Filed: September 18, 2008
    Publication date: June 25, 2009
    Inventors: Yasunori Taguchi, Takashi Ida, Toshimitsu Kaneko, Nobuyuki Matsumoto, Takeshi Mita, Hidenori Takeshima, Toshiyuki Ono
  • Publication number: 20090156643
    Abstract: There is provided a novel pesticide, particularly an insecticide or an acaricide. A substituted isoxazoline compound of formula (1) or a salt thereof: wherein A1, A2 and A3 independently of one another are carbon atom or nitrogen atom, G is benzene ring, etc., L is —CH2—, —C(CH3)—, —CH(CN)—, etc., X is halogen atom, C1-C6haloalkyl, etc., Y is halogen atom, C1-C6alkyl, etc., R1 is —C(O)R1a, —C(O)OR1a, —C(O)NHR1a, etc., R2 is hydrogen atom, C1-C6haloalkyl, —C1-C4alkoxy C1-C4alkyl, cyano C1-C6alkyl, C3-C6alkenyl, C3-C6alkynyl, —C(O)R15, —C(O)OR15, etc., R3 is C1-C6haloalkyl, etc., m is an integer of 0 to 5, n is an integer of 0 to 4. The pesticide containing these compounds.
    Type: Application
    Filed: September 4, 2008
    Publication date: June 18, 2009
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takeshi Mita, Kazushige Maeda, Mitsuaki Komoda, Eitatsu Ikeda, Ken-ichi Toyama, Motoyoshi Iwasa