Patents by Inventor Yasunari TAKAI

Yasunari TAKAI 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: 20220237095
    Abstract: A log retrieval support device 30 specifies a rare series that is an abnormal event group in a log recording a plurality of events executed in a predetermined system, generates a condition for regarding that there is a log having the same event group as each of the rare series, and specifies the number or ratio of logs having the same event group as each of the rare series among a plurality of logs recording a plurality of events executed in the predetermined system on the basis of the conditions. The log retrieval support device generates a new condition obtained by partially relaxing the condition in the case where the number or ratio is less than a predetermined value and generates a new condition obtained by partially limiting the condition in the case where the number or ratio is the predetermined value or more.
    Type: Application
    Filed: September 7, 2021
    Publication date: July 28, 2022
    Applicant: HITACHI, LTD.
    Inventors: Yasunari Takai, Tadahisa Kato, Yuki Noyori, Michio Iijima, Yoshikatsu Saitou
  • Publication number: 20210374170
    Abstract: A base word inputting unit 101 accepts a base word set 121 for acquiring a text 123. A related word acquisition unit 103 repeatedly acquires a related word on the basis of the base word set 121 and a text data group. A data acquisition unit 102 acquires a text 123 according a word and a related word from a storage apparatus 106. A data filter unit outputs the text 123 filtered using the word and the related word. An information storage unit 105 stores the outputted text.
    Type: Application
    Filed: January 16, 2020
    Publication date: December 2, 2021
    Applicant: Hitachi, Ltd.
    Inventors: Tadahisa Kato, Ai Toshikuni, Yasunari Takai, Yasuto Nishiwaki, Tarou Sakisaka, Teruhide Kusaka
  • Patent number: 11138173
    Abstract: A table relation analysis assisting apparatus analyzes a relation between pieces of data in a certain column (external key) astride tables in a relational database. The apparatus analyzes a relation between tables and holds inter-table relation analysis information in which tables, pieces of data in the tables being in a one to one relation or a plural to one relation, are defined as one table group. In the apparatus, an analysis result display unit provides a display in such a form that one or more tables in a relational database are contracted into a table group. The display unit displays table groups in such a form that which of a one to one relation or a plural to one relation a relation between pieces of data included therein is astride tables can be viewed.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: October 5, 2021
    Assignee: HITACHI, LTD.
    Inventors: Yasunari Takai, Keishi Ooshima, Katsumi Kawai, Makoto Kimura, Kiyoshi Yamaguchi
  • Publication number: 20210191933
    Abstract: A data analysis device 100 includes a storage device 101 configured to store pieces of knowledge used for data analysis, and a computing device 104 configured to perform a process of extracting variables defining the pieces of knowledge from the pieces of knowledge, a process of specifying values corresponding to the variables for data to be analyzed, and a process of performing, based on the values corresponding to the variables and a predetermined evaluation index, an analysis process for a relation between the variables and the evaluation index to specify information related to a combination of the variables for improving the evaluation index as a suggestion for improvement of the evaluation index.
    Type: Application
    Filed: September 4, 2020
    Publication date: June 24, 2021
    Inventors: Tadahisa KATO, Yasunari TAKAI, Yuichiro NAKAGAWA, Ryota MIBE, Toshiyuki UKAI, Yasuharu NAMBA
  • Patent number: 10489428
    Abstract: The present invention has an object to analyze, regarding an existing system without a source code, the relationship between input items and internal system processing with respect to output items and present the analysis results to a user. An existing system processing specification extractor is an apparatus for making an existing system operate and analogizing input items of the existing system and internal system processing patterns without performing analysis of implementation and includes: an output data change information acquisition unit that classifies changes of output data associated with input to the existing system on the basis of types of changes of each output element; and an internal system processing specifying unit that combines the classifications obtained by making different input to the existing system and specifies a type of processing based on a usage pattern of an input item value.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: November 26, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Yasunari Takai, Katsumi Kawai, Shuhei Nojiri, Ryota Mibe, Kiyoshi Yamaguchi
  • Publication number: 20190095474
    Abstract: A table relation analysis assisting apparatus analyzes a relation between pieces of data in a certain column (external key) astride tables in a relational database. The apparatus analyzes a relation between tables and holds inter-table relation analysis information in which tables, pieces of data in the tables being in a one to one relation or a plural to one relation, are defined as one table group. In the apparatus, an analysis result display unit provides a display in such a form that one or more tables in a relational database are contracted into a table group. The display unit displays table groups in such a form that which of a one to one relation or a plural to one relation a relation between pieces of data included therein is astride tables can be viewed.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 28, 2019
    Applicant: HITACHI, LTD.
    Inventors: Yasunari TAKAI, Keishi OOSHIMA, Katsumi KAWAI, Makoto KIMURA, Kiyoshi YAMAGUCHI
  • Patent number: 10162601
    Abstract: In order to realize a method for analyzing an impact of change with less misidentification and missing, an apparatus for analyzing an impact of change for investigating a change impact range caused by a change in requirements and specifications includes: a storage unit that stores design information and keywords; an input unit that inputs a trace condition including the design information representing an origin of a change impact analysis in design conditions stored in the storage unit and the keywords stored in the storage unit; a CPU that receives the trace condition including the design information representing the origin of the change impact analysis and the keywords from the input unit, and calculates an influence score representing a probability of the influence caused by the change in the requirements and the specifications for each of the design information; and a display unit that outputs a result calculated by the CPU.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: December 25, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Yasunari Takai, Katsumi Kawai, Yusuke Jin, Ryosuke Tsuchiya, Ryota Mibe, Tarou Sakisaka
  • Publication number: 20180081637
    Abstract: In order to realize a method for analyzing an impact of change with less misidentification and missing, an apparatus for analyzing an impact of change for investigating a change impact range caused by a change in requirements and specifications includes: a storage unit that stores design information and keywords; an input unit that inputs a trace condition including the design information representing an origin of a change impact analysis in design conditions stored in the storage unit and the keywords stored in the storage unit; a CPU that receives the trace condition including the design information representing the origin of the change impact analysis and the keywords from the input unit, and calculates an influence score representing a probability of the influence caused by the change in the requirements and the specifications for each of the design information; and a display unit that outputs a result calculated by the CPU.
    Type: Application
    Filed: January 6, 2017
    Publication date: March 22, 2018
    Inventors: Yasunari TAKAI, Katsumi KAWAI, Yusuke JIN, Ryosuke TSUCHIYA, Ryota MIBE, Tarou SAKISAKA
  • Publication number: 20180067916
    Abstract: An analysis apparatus comprises a processor configured to execute a program; and a storage device configured to store the program and a document group having a spreadsheet format, the processor being configured to execute: acquisition processing for acquiring the document group from the storage device; classification processing for classifying documents in the document group acquired by the acquisition processing into at least one shared form group having a shared form based on a commonality relating to a character string included in a cell of each document among the documents in the document group and to a position of the cell including the character string; and output processing for outputting a classification result obtained by the classification processing.
    Type: Application
    Filed: May 18, 2017
    Publication date: March 8, 2018
    Applicant: HITACHI, LTD.
    Inventors: Ryosuke TSUCHIYA, Shuhei NOJIRI, Katsumi KAWAI, Nishio YAMADA, Yusuke JIN, Yasunari TAKAI
  • Publication number: 20170270185
    Abstract: The present invention has an object to analyze, regarding an existing system without a source code, the relationship between input items and internal system processing with respect to output items and present the analysis results to a user. An existing system processing specification extractor is an apparatus for making an existing system operate and analogizing input items of the existing system and internal system processing patterns without performing analysis of implementation and includes: an output data change information acquisition unit that classifies changes of output data associated with input to the existing system on the basis of types of changes of each output element; and an internal system processing specifying unit that combines the classifications obtained by making different input to the existing system and specifies a type of processing based on a usage pattern of an input item value.
    Type: Application
    Filed: August 1, 2016
    Publication date: September 21, 2017
    Inventors: Yasunari TAKAI, Katsumi KAWAI, Shuhei NOJIRI, Ryota MIBE, Kiyoshi YAMAGUCHI