Toku is a Japanese pilgrimage and sightseeing app that helps users discover and document visits to shrines, temples, castles, and historic sites. Its digital record book brings together places connected with Japanese history, religious traditions, and notable historical figures, supporting both casual browsing and planned journeys. Users can explore more than 150,000 locations across Japan through an interactive map or searchable lists, including options to browse by prefecture, pilgrimage route, religious benefit, or person.

The service also features popular destinations, community posts, and articles covering foundational knowledge, historical periods, architecture, Buddhist statues, visiting etiquette, and seasonal events. By combining practical discovery tools with background reading, Toku is designed to help people learn about the places they visit as well as keep track of their experiences, including shrine visits and goshuin stamps. The app is available through the App Store, and the site says it is free to start using without registration; visitors can also browse the map before downloading