Only the current version so far — new entries appear as the app ships updates.
高速バスドットコム−日本全国の約140社の高速バスを簡単予約 is a travel & local app by オンライントラベル株式会社 with 100,000+ downloads (about 427K estimated). +2.1K installs in the last 7 days. Released May 25, 2016. Install growth, rank history, SDKs and ad networks.
From the store listing: “App version of the reservation site "Kousoku Bus.com" with 1.8 million users annually. You can search, compare, and make reservations by narrowing down various conditions from over 3,000 low-cost express buses and night buses.”