Nisshinkan was the highest school of the Aizu domain, built in 1803 for the purpose of nurturing human resources.

Children of Aizu clan members entered the school at the age of 10 to study and engage in martial arts to train their minds and bodies.

The school, with its martial arts hall, observatory, and the Suirensuima Pond, said to be the oldest swimming pool in Japan, was located on a site of approximately 8,000 tsubo (approximately 1,000 square meters) and produced many outstanding individuals, including Yae Niijima's own brother Kakuma Yamamoto and the boys of the Byakkotai (White Tiger Squadron). Kakuma later served as a professor of Dutch studies at the Nisshinkan.

In the Nisshinkan, which has been faithfully restored to its original state, visitors can view the grandiose Edo architecture and learn about the study of the time, as well as enjoy various bushido experiences such as archery and Zen meditation, and paint Aizu's lucky charm, “Akabeko”.