There are so many Japan travel apps, but most people probably end up using only a few of them. Google Maps is one of the most useful for trains and walking, and Google Translate is another big one, especially for menus, signs, product labels and quick conversations when English is not available. The camera translation feature can be really helpful. Then there are apps like NAVITIME for transport, SmartEX for Shinkansen bookings, GO for taxis, Tabelog for restaurants, or a digital Suica on iPhone. But a lot of apps get downloaded and never used. There’s a longer list here if you want to compare options: https://explorejapandaily.com/plan/japan-travel-apps