Digital music fans in Japan who use Apple products will no doubt be happy by this news.A small stack of Digimon Adventure tri. songs have been added to iTunes in Japan.Each song is 250 yen. Butter-Fly ～tri.Version～ by Wada Kouji (the opening theme for Digimon Adventure tri.) Brave Heart ～tri.Version～ by Ayumi Miyazaki (the evolution insert theme for Digimon Adventure tri.) I Wish ～tri.Version～ by AiM (the ending theme for Digimon Adventure tri. part 1) Seven ～tri.Version～ by Wada Kouji (the ending theme for Digimon Adventure tri. part 2) Boku ni Totte by Knife of Day (the ending theme for Digimon Adventure tri. part 3)They also added Knife of Day's other song from the Boku ni Totte single release, Which Update- The Digimon Music producer has mentioned that Butter-Fly has apparently done quite well digitally.It's ranked 14th on the iTunes Anime Song Charts.He also notes the original version of Butter-Fly also ranked quite well.I looked around iTunes Japan and it's in the top 150 overall charts also.