If you're looking to Download Railway.jp on your Chromebook laptop Then read the following guideline.

An application to record by visiting the railway station in Japan. You can record when approaching within 100 e-mails of the station. We accommodate 8,907 stations (597 routes) including JR, private railway, subway, tram, monorail in Japan. At stations that cannot receive GPS, such as subway stations, the current location may not be displayed correctly. Long GPS usage will consume the battery considerably.