Japan's IC cards, particularly for transit systems, have garnered a lot of commentary recently regarding their speed, functionality, and comparison to other global systems. Key points brought up include: - Many users report that IC cards are much faster than other contactless payment methods, such as EMV cards, particularly in systems like London where latency can be an issue. - Some users contrast Japan's system positively against those in Australia and Taiwan, where ease of use and acceptance at a wider range of locations (including convenience stores and various transport systems) is highlighted. - There are technical discussions on the limitations of certain phones that can't use Japan's Osaifu-Keitai features due to regional restrictions, leading to frustrations among users who want to leverage their devices. - Overall, while IC cards function efficiently, the multifaceted payment ecosystem in Japan presents challenges for foreign visitors and residents alike, with varying acceptance and integration between services.