Staff writer

When Softbank Corp. and the operator of the U.S. Nasdaq stock market announced in June the creation of a new market to sell shares of emerging Japanese companies, the news dealt a serious blow to the Tokyo Stock Exchange, the nation's largest bourse.

The TSE, with a total market value of 383 trillion yen, has never really had to compete with another entity, but it suddenly awakened to the grim possibility of losing business with startups to the Nasdaq-Softbank venture.