An unexpected hit, the Japanese play "So-hin" (translated as the "Rustic Performance"), has achieved tremendous sales unobserved in the history of Japanese theater. However, the reason behind this phenomenon is still a riddle. The show's content, cast, and staging are considered standard, leaving audiences and critics alike to speculate on the driving force behind this unforeseen success story.

In Japan, theater performances often depict social issues or historical events. Though there isn't a tradition of record-breaking sales in theater like in the movie industry, this situation has certainly piqued the interest of the public. Theater is highly regarded in Japanese society, and the sudden surge in popularity of a seemingly ordinary play is a hot topic.

In the US or EU, box office success is often determined by a combination of elements such as star power, marketing campaigns, and critical reception. While similar factors apply in Japan, there also seems to be an unpredictable element prompting the success of productions like "So-hin".