イルーナ戦記 or Iruna Senki is a Japanese version of Iruna Online.
The link above is a link for download the latest version of Iruna Senki.
For those who want to try play, go ahead!
Please mind your manners while playing the game. Don't randomly send friend, party, guild, trade invites/requests to other people as it's considered rude. The most important thing is don't ask for free items and help level up!!!
※Let me know if something wrong with the link and/or the apk.