The Tokyo Stock Exchange on Tuesday began allowing smaller price increments on shares of about 80 of Japan's biggest companies as the bourse seeks to win back business from private trading venues.

Topix 100 members whose shares cost between ¥1,000 and ¥5,000 now trade in ¥0.5 price movements, down from ¥1. This includes Honda Motor Co. and Japan Tobacco Inc.

Shares in the gauge priced less than ¥1,000, such as Mizuho Financial Group Inc., can trade in ¥0.1 bands, a tenth of the previous size.