Japanese - bcit-ci/CodeIgniter GitHub Wiki
NOTE: official translations are at https://github.com/bcit-ci/codeigniter3-translations
CodeIgniter language packs [quote] Version 2.0.1 Version 1.7.0 Version 1.5.x [/quote]
User Guide translations [quote] Version 2.0.1 Version 1.5.4 [/quote]