The Apple iPhone seems to be experiencing a cooler reception in Japan than it did in other countries around the world.

According to market-research firm MM Research Institute, Apple sold about 200,000 phones in Japan in the first two months. Since then, however, demand has been falling steadily, and analysts now widely believe sales are unlikely to reach a total of 500,000 units. That is half the one million units that they previously thought Apple could sell. One big challenge is that Japanese users already have access to some of the most advanced mobile-phone technologies in the world. Models currently sold by Japanese cellphone makers typically contain a high-end color display, digital TV-viewing capability, satellite navigation service, music player and digital camera. Many models also include chips that let owners use their phones as debit cards or train passes. Noriko Tanaka, a 34-year-old Softbank customer in Tokyo, said she likes the iPhone’s touch screen, but would prefer a phone with digital television capability. “The touch screen looks fun, but I’m not sure I could get used to it,” said Ms. Tanaka.