Heavy snow is predicted to fall in eastern and western area towards the year-end holiday season. There may be possible train and flight delays and cancellations. Please check below resources for updates and details.
Heavy snow in Hokkaido (January 5)
Japan Visitor Hotline
Japan National Tourism Organization (JNTO) operates a visitor hotline 24 hours a day, 365 days a year. Call for tourist information or assistance in the case of accidents and emergencies. Support is available in English, Chinese, Korean and Japanese.
From Japan 050-3816-2787
From Overseas +81-50-3816-2787
Weather Warnings and Advisories
Airport
National airlines and LCCs
Trains
Safety tips for travelers
Japan Tourism Agency's "Safety tips for travelers" contains links to other sites controlled by third-party information providers on weather information, weather warning & advisories, news, medical information, and list of embassies and consulates-generals in Japan.
https://www.jnto.go.jp/safety-tips/eng/ 
For safe travels in Japan
Japan Tourism Agency's "Guide for when you are feeling ill " provides medical institutions information, search function, and guideline. The website is available in English, Chinese, and Korean.
Tourist information centers throughout Japan certified by JNTO can offer practical information about airport facilities, flights, accommodation and transport. Please check the website below to find the information centers nearby.
https://tic.jnto.go.jp/
Further queries may be directed to JNTO Tourist Information Center (TIC) at 03-3201-3331 (or +81-3-3201-3331 from outside Japan) available 24/7 in English, Chinese, Korean and Japanese languages.
Navigation App
Download "Japan Official Travel App" for comprehensive route search.
Japan Official Travel App
Twitter @JapanSafeTravel
JNTO official Twitter account provides useful information on weather warnings, advisories and latest news of transportation services in case of natural disasters.
Twitter @JapanSafeTravel
