How it works
For example, for a stock with a trading unit of 100 shares, trades are generally made in multiples of 100 shares — 100, 200, and so on. To buy one trading unit of a stock priced at 3,000 yen, you would need roughly 300,000 yen.
Difference from odd-lot shares
Share quantities smaller than one trading unit (odd-lot shares) generally cannot be traded on the regular exchange market, but some brokerages offer odd-lot trading services that let investors start investing in stocks with a smaller amount of capital.