The Tokyo Stock Exchange's worst technical glitch in six years has forced a rethink of the role alternative trading platforms play in ensuring trade in shares of global corporations continues.

A Feb. 2 computer malfunction that halted trading on 15 percent of the bourse's biggest stocks was exacerbated when the Japan Securities Dealers Association asked alternative venues to stop processing transactions.

The broker's association will from this month allow platforms such as Chi-X Japan and SBI Japannext to keep trading if the TSE is disrupted, said Ryuichi Yamamoto, a manager of proprietary trading rules at the association.