Twitter’s Dorsey Vies With SoftBank’s Son for Japan Shops: Tech

Twitter Inc. co-founder Jack Dorsey sparked a price war over Japanese credit-card transactions with SoftBank Corp.’s Masayoshi Son. Entrepreneurs like Yukiko Kurano are the biggest winners so far.

Kurano said she began using Son’s venture with PayPal Inc. to process credit-card payments at her Otogi Designs studio in Tokyo eight months ago, saving on the 200,000 yen ($2,000) it would cost to set up a conventional service. When Dorsey introduced Square Inc.’s lower-priced smartphone-based option, Kurano switched, only to change sides again when Son hit back with even cheaper levies on each transaction.