[3] For the Patlabor series, he was heavily involved in its production as one of the members of the copyright holder group Headgear.

[8][a] When Izubuchi was in nursery school, the Japanese TV anime series Astro Boy began airing.

[3] After that, all Tokusatsu programs focused on family and children's entertainment, which made Izubuchi no longer enjoyable.

[3] Later, as if to replace them, anime series with complex stories that appealed to adults began to be produced, and his interest shifted to that.

[10] Not just limited to anime, he also branched out into Tokusatsu shows in Toei's Super Sentai Series, designing characters and costumes for creatures and villains.

He created the standard for Western-style fantasy visual imagery in Japan by taking images popular worldwide and drawing them in a sophisticated manner.

[13] He and president Masahiko Minami created a new fictional world and historical background in order to make it Bones' own IP (intellectual property) work.