Synopsis

While packing for a move, elementary school student Ryuuhei finds his father's old school notebook detailing a search for a treasure in Tokyo's vast network of underground passages. With his little brother tagging along, he and three friends from an online chat room gather and set out on a quest to find the treasure. What they discover instead is an entire underground community composed of assorted eccentrics, including a senile old soldier still performing a World War II-era mission.

Episodes

not known yet

Sign in to mark episodes watched and keep your place across editions and apps.

Sign in

Cast 0

No cast yet. A cast belongs to an edition, so it is added on the edition’s form. Add the cast

Tags 0

Spoilers
NoneMinorAll
No tags yet. Tags say what a work is about and how it plays; each can be marked as a minor or major spoiler. Add tags

Media 0

No screenshots yet. Add screenshots

Related works

2 works in this family
Manga source
SOS Dai Tokyo Tankentai
Anime this work
Shin SOS Dai Tokyo Tankentai this page

Editions

1 releases + New edition

Page history

3 revisions View all
  1. r3 source · import Imported from AniList +1 field Oct 2026
  2. r2 source · import Imported from AniList ±2 fields Oct 2026
  3. r1 source · import Imported from Wikidata +6 fields Oct 2026

Reviews

0 ratings An average appears once 3 readers have rated it.

No reviews yet. Be the first.