Bankoudou Hall

Bankoudou Hall (晚講堂,) is a secret hiding place of the Armed Detective Agency.

Description
At a wall, it has a sign that says "Lacking in duty, lacking in humanity, the cause of shame". The auditorium has no regular entrance. In order to reach it, one must travel along an abandoned rail trail.

Background
It used to be a base before Yukichi Fukuzawa founded the agency.

The Guild Arc
Fukuzawa orders Kunikida to gather the agency members at the hall during the Guild war. Shortly after, the agency members gathered at the hall as requested by Fukuzawa. He then tells Dazai to explain the matters behind the ongoing war. Dazai soon explains their strategy as they are outmanned by the Port Mafia and outfinanced by the Guild, which is for them to be divided in offensive and defensive teams.

Trivia

 * Fukuzawa’s speech and debate hall, named Mita Speech Hall (三田演説館,) was the reference for the Agency’s secret base.