IIDA, Nagano Prefecture—Hideo Shimizu has been frustrated by the reluctance of a peace memorial museum here to display panels about the infamous Unit 731, where he worked during World War II.

In May last year, a peace memorial museum opened in Iida, also in Nagano Prefecture. It was expected to show panels about Unit 731, including some featuring testimonies by Shimizu. But the plan ...

(It ended on September 2, 1945.) The story is set in Nagano, Japan, during 1941. The tale begins with a family visiting an 80th Anniversary Peace Memorial Exhibition and a child visiting with his ...