Takuya Numakawa (沼川 拓也) is a worker under Ōtsuki in Squad E in the underground labor camps.

He has a spin-off manga called Ichinichi Koshitsuroku Numakawa were he is the main protagonist.


Tobaku Hakairoku Kaiji

He along with Isawa help Ōtsuki at managing Squad E. He also plays a vital part in Ōtsuki's Underground Chinchiro for it to work properly.

Ichinichi Gaishutsuroku Hanchou

He plays a supporting role in the spinoff along with Isawa.

He is not used to going outside the underground labor camp for a day and struggles on how to enjoy his time outside. Ōtsuki decides to teach him how to enjoy the day properly.

Ichinichi Koshitsuroku Numakawa

Numakawa buys a one day ticket for an appartment. He grows bored since he is still underground. He sings Karoke and gets heared by his fellow miners.

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