![Seiji Shingen](https://img.flawlessfiles.com/_r/400x400/100/eb/30/eb3000c202afbe2febdf8c1c7baa11ad/eb3000c202afbe2febdf8c1c7baa11ad.jpg)
Seiji Shingen
信玄 誠司
Shingen’s ex-job was a Self-Defense Forces member. Though his past is rather vague, it's clear that he lost a close friend on the job and in his honor, he always wears his friend's dog tags in his casual attire.
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THE IDOLM@STER SideM Wakeatte Mini!
Supporting (Role) TV
![Masumoto, Takuya](https://img.flawlessfiles.com/_r/100x100/100/ef/3a/ef3aa420a5477985eeba7bdb8fbfc39d/ef3aa420a5477985eeba7bdb8fbfc39d.jpg)