The Tokyo Stock Exchange (TSE) is mulling whether to extend its trading hours. On July 25, it published a discussion paper that proposed specific approaches to extending trading hours and highlighted anticipated points of contention. The TSE solicited public comments on the discussion paper through September 10. It plans to announce its intended course of action by year-end. Following is a discussion of the background of the debate about extending of trading hours, interspersed with my personal opinions regarding certain key points.