Study of lightning and atmospheric electricity at the summit of Mt. Fuji

Department of Physics, Tokyo Gakugei University


We investigate lightning and related phenomena from the summit of Mt. Fuji. In the observation, we focus on the following topics: 1) Energetic radiation associated with thunderstorm. 2) Sprite and elves. 3) Eliminate the lightning damage in order to establish a safe solar electric system and also for the safe observational researches at the station.


Stratosphere-troposphere exchange by deep convective clouds

Suginori Iwasaki

National Defence Academy

Department of Physics, Tokyo Gakugei University


Our main aim is to estimate the amount of substances, such as water vapor, transported from the troposphere to the stratosphere by extremely developed cumulonimbus clouds. A cloud jumped 1-2 km from a top of cumulonimbus is known as a jumping cirrus and it would effectively transport the substances from the troposphere into the stratosphere because of diabatic process. To reveal its characteristics, we take the time-lapse photos of the clouds by several cameras.


Continuous monitoring of cosmic-ray induced neutrons at the summit of Mt. Fuji

Kazuaki YAJIMA
National Institute of Radiological Sciences

We have monitored cosmic-ray induced neutrons with the radiation monitoring system using a long-distance wireless LAN constructed in the Mt. Fuji Weather Station located at the highest place in Japan (3,776 m above sea level). In 2014, we carry out the maintenance of the monitoring system during a summer observation period, and continue the whole-year radiation monitoring.

 (This project was stopped in 2016)