Great Japan
Chemical Defense Association
大日本國防化学協会
This group was led by Shiro Ishii, one of the most notorious figures of WW2.

More info to be recorded later...
Inscribed 'Gas Protection Lecture, Completion Badge. Great Japan Chemical Defense Association.'


Measures about 3.5 cm by 2.5 cm.
Inscribed 'Member Badge. Great Japan Chemical Defense Association.'
The case (below) reads the same except for a 'Breast Badge' designation.
Inscribed 'Great Japan Chemical Defense Association.
Instructor.'

The attached badge is not a member badge (see
above). It has four hooks that were attached to the
armband with thread. Beneath the badge appears to be
an image of the badge.
Inscribed 'Tokyo Chemical Defense Association. Trustee.'

The attached badge is not a pin badge like the one shown below. It
has two prongs that were attached to the armband.