au Kabucom

au Kabucom (auカブコム) is a Japanese online securities brokerage brand that originated as the retail online brokerage arm associated with the au telecommunications brand and later became part of the Mitsubishi UFJ Financial Group (MUFG) orbit. The service is now officially branded Mitsubishi UFJ eSmart Securities (三菱UFJ eスマート証券), with the au Kabucom name retained as a legacy/former name in official communications. It provides Japanese retail investors with online access to domestic equities, U.S. equities, margin trading, FX, investment trusts, NISA accounts, and futures and options. The platform competes in Japan's discount/online brokerage market, positioning itself on low cost and broad product coverage. Its domestic equity trading is marketed as effectively commission-free when customers use SOR (Smart Order Routing) orders, and it promotes low margin-trading interest and stock-lending rates relative to major online peers. It also offers small-lot investing through its "プチ株" (Petit Stock) service, which allows buying from a single share with zero trading commission, and investment trusts starting from 100 yen. A distinctive feature of the brand is its integration with the au/KDDI customer ecosystem, including Ponta points and au PAY card loyalty programs. Customers can invest using Ponta points and earn Ponta points through au PAY card investment-trust accumulation, tying brokerage activity to the broader au mobile and payment loyalty platform. The firm also runs financial education content under the "ゼロから学べる資産形成" (asset building you can learn from zero) program, offering animated videos on equities, ETFs, bonds, investment trusts, and REITs. As of the evidence, the brand operates under the Mitsubishi UFJ eSmart Securities name while continuing to reference its former au Kabucom Securities identity. It serves Japanese retail investors and offers NISA accounts, iDeCo, and a range of investment products. The brand's ownership sits within MUFG, one of Japan's largest financial groups, while its au branding heritage connects it to KDDI's telecommunications and loyalty ecosystem.

au Kabucom Securities traces its identity to the au brand of KDDI, one of Japan's major telecommunications groups, which lent its name to a retail online brokerage venture. The brokerage operated under the au Kabucom name and built a customer base among Japanese retail investors seeking low-cost online trading. Over time, the business became associated with the Mitsubishi UFJ Financial Group (MUFG), one of Japan's largest financial conglomerates, and was eventually rebranded as Mitsubishi UFJ eSmart Securities (三菱UFJ eスマート証券). Official communications continue to reference the former name au Kabucom Securities, reflecting the brand's transition. The platform's development has focused on cost leadership and product breadth. It introduced SOR (Smart Order Routing) orders that automatically select the best execution venue among multiple markets, and it markets domestic equity trading as effectively commission-free when SOR orders are used. It also offers the Petit Stock (プチ株) service for single-share investing with zero commission, and investment trusts starting from 100 yen. The brand has emphasized low margin-trading costs, advertising interest and stock-lending rates at levels it describes as the lowest among major online securities firms. A defining strategic element has been integration with the au/KDDI customer ecosystem. Customers can use Ponta points to purchase investment trusts and Petit Stock, and can earn Ponta points through au PAY card investment-trust accumulation. The au Value Link program further ties brokerage accounts to mobile and payment services, offering point bonuses for customers holding NISA accounts and au PAY Gold cards. This loyalty integration differentiates the brand from standalone online brokers. The firm has also invested in investor education, launching the "ゼロから学べる資産形成" (asset building you can learn from zero) program with animated videos covering domestic equities, U.S. equities, ETFs, bonds, investment trusts, and REITs. Recent announcements include expansion of U.S. stock coverage to over 4,000 issues, daily delivery of margin trading balances by issue, and a new "Otameshi Shinyo" margin service for beginners with 1x leverage. The brand continues to operate as an MUFG-affiliated online brokerage serving Japanese retail investors.

• Announced new 'Otameshi Shinyo' margin trading service for investment beginners, to launch October 3, 2026.

• Announced expansion of U.S. stock lineup by about 1,400 issues, bringing total to over 4,000 by end of September 2026.

• Announced daily delivery of margin trading balances by issue starting October 3, 2026.

Low-cost online brokerage integrated with the au/KDDI loyalty ecosystem, offering broad product coverage for Japanese retail investors.

• Domestic equities trading

  Commission-free in principle when using SOR orders; Petit Stock available from one share with zero commission.

• U.S. equities trading

  Lineup expanded to over 4,000 issues by around end of September 2026.

• Margin trading

  Low interest and stock-lending rates; new 'Otameshi Shinyo' service with 1x leverage for beginners.

• Investment trusts

  Purchasable from 100 yen with zero purchase fees; Ponta points and au PAY card accumulation available.

• FX

  Foreign exchange trading with swap point transfer and demo trading.

• NISA accounts

  Tax-free investment accounts for domestic stocks, U.S. stocks, and investment trusts.

• iDeCo

  Individual defined contribution pension with eMAXIS Slim-centered lineup.

• Futures and options

  Futures and options trading with promotional campaigns.

• Exchange-traded CFDs (くりっく株365)

  Exchange-traded CFD products with promotional campaigns.

1. 1三菱UFJ eスマート証券（旧社名：auカブコム証券）| ネット証券kabu.com
2. 2三菱UFJ eスマート証券の「ゼロから学べる資産形成」kabu.com
3. 3国内株式 手数料 0円～手数料の負担ゼロ、資産形成をより身近に。kabu.com
4. 4100円からはじめられる資産形成kabu.com