The Tokyo Stock Exchange, trading units and odd lots, TOPIX vs Nikkei, dividends and shareholder benefits, and NISA.
Japanese shares trade on the Tokyo Stock Exchange in units (usually 100 shares), though odd-lot/fractional services let you buy less; broad exposure comes via TOPIX or Nikkei 225, and eligible shares can be held in NISA’s growth allowance.
Japanese listed shares trade on the Tokyo Stock Exchange, generally in trading units (単元) of 100 shares, so a ¥3,000 share implies a ¥300,000 lot. To invest smaller amounts, many brokers offer odd-lot or fractional-share services (単元未満株) that let you buy fewer than one unit, though pricing and available stocks differ by broker.
Orders can be market (成行) — prompt execution at available prices — or limit (指値) — only at your specified price or better. Understanding the difference matters: a market order is likely to fill but at an uncertain price, while a limit order controls price but may not execute.
For broad Japanese exposure, two indices dominate. TOPIX is a broad, capitalisation-weighted index of a large swath of the market. The Nikkei 225 is price-weighted and more concentrated in a smaller set of high-priced names, so the two can behave differently. Index funds and ETFs track each; most investors seeking Japan exposure use a broad-market fund rather than picking individual stocks.
Japanese companies commonly pay dividends, and many operate shareholder benefit programs (株主優待) offering goods, vouchers, or discounts to holders. These perks can be appealing but should not drive investment decisions — the underlying business economics and valuation matter far more than a coupon.
Eligible individual Japanese shares can be bought in NISA’s growth allowance (成長投資枠), not the recurring allowance, which is reserved for screened funds. Broad Japanese index funds and ETFs can sit in either allowance depending on eligibility. Dividends need the proportional allocation method to stay tax-free in NISA.
If you do pick individual stocks, treat it as a deliberate, limited sleeve on top of a diversified core — fundamental analysis of business economics, governance, balance sheet, and valuation is demanding, and a single company can suffer permanent loss. The common mistake is concentrating a whole portfolio in an employer’s stock or a few familiar brands.
Brokerage (NISA/iDeCo) · Rakuten Securities
A leading low-cost brokerage for NISA and index-fund investing, integrated with Rakuten points and Rakuten Bank.
Fees: Many domestic funds and trades are low- or no-commission — verify current fee schedule.
Brokerage (NISA/iDeCo) · SBI Securities
Japan’s largest online brokerage by accounts, with a very broad low-cost fund lineup and full NISA/iDeCo support.
Fees: Many trades and funds are low- or no-commission — verify current fee schedule.
Brokerage (NISA/iDeCo) · Monex
An established online brokerage often chosen for US-stock access and research tools, with NISA and iDeCo support.
Fees: Commissions vary by product; some funds/trades are low-cost — verify current schedule.
This is education, not a recommendation. Most beginners research low-cost, broadly diversified index funds — for example all-country (全世界株式) or S&P 500 trackers — rather than picking individual stocks, because low fees and diversification are within your control while returns are not. Understand that values fall as well as rise, match the risk to your time horizon, and never invest money you may need soon.