Development of sign language database


The first step in the study of sign languages is to collect sign language data, but compared to spoken language research, not enough data has been developped. The way in which signs are recorded varies according to the purpose of the research, as signs are expressed using the whole body and 3D-space, and there is no specific recording method or form of recording, and even if data is collected for research purposes, it is not always possible for another researcher to reuse it. data collection and accumulation is made difficult by a variety of reasons.

Led by Professor Yuji Nagashima (Professor at Kogakuin University *now Professor Emeritus), who has been involved in the engineering research of sign languages for many years, we participated in a project to develop a large-scale, high-precision database of Japanese Sign Language words. Unparalleled in the world, over 5,000 of Japanese Sign Language words were recorded using optical motion capture equipment, and the database was made available for research purposes. The development of the KoSign database was supported by the Grant-in-Aid for Scientific Research (KAKENHI), Kiban-Kenkyu (S).


  • Kogakuin University Japanese Sign Language Multi-Dimensional Database (KoSign) [DOI] [URL]
  • Keiko Watanabe, Yuji Nagashima, Daisuke Hara, Yasuo Horiuchi, Shinji Sako, Akira Ichikawa, "Construction of a Japanese Sign Language Database with Various Data Types", International Conference on Human-Computer Interaction (HCII2019), Communications in Computer and Information Science book series (CCIS), Vol. 1032, pp.317–322, Jul. 2019. [DOI]
  • Shinji Sako, Yuji Nagashima, Daisuke Hara, Yasuo Horiuchi, Keiko Watanabe, Ritsuko Kikusawa, Naoto Kato, Akira Ichikawa, "Discussion of a Japanese sign language database and its annotation systems with consideration for its use in various areas", LingCologne2019, Poster Nr. 24, Jun. 2019.
  • Yuji Nagashima, Daisuke Hara, Shinji Sako, Keiko Watanabe, Yasuo Horiuchi, Ritsuko Kikusawa, Naoto Kato, Akira Ichikawa, "Constructing a Japanese Sign Language Multi-Dimensional Database", The 7th Meeting of Signed and SpokenLanguage Linguistics (SSLL 2018), Sep. 2018. [PDF]