Gourmet Navigator

Not in English (unlike website). Range is good, but restaurant information is very basic. It doesn't give you ratings/reviews of restaurants and you cannot order through it. Other information like location, opening times and table reservation are there.

Great app!!! Can search for different restaurants down to the accuracy of types of food, how popular it is and menus. Reserve early in advance is also available. The app uses Japanese which I fortunately understand but other than that I think it's a great. Just use Google translate for japanese words of food like sushi=寿司 and paste that in the search bar and filter the locations by pasting current location=現在地 or popular=人気 too. (you can search for specific locations too but more kanji)

Japanese only, no English even though they have an English web site so they have the translation capability already. Sadly, they chose to neglect the app.