The artist said that the submarine is the I-58

T34/38 said:

The artist said that the submarine is the I-58

Aren't those Kaitens loaded on it?

Yup, it's Kaiten.

• http://en.wikipedia.org/wiki/No.101-class_landing_ship

Wow, look it the size of those torpedoes or wait. Are they mini subs?

Kaiten were manned torpedoes and suicide craft.