Reference of this calculation is below.
Rika Nenpyo (Chronological Scientific Tables 2005) (in Japanese).
Tentai Ichihyo (2009 Japanese Ephemeris) (in Japanese).
Tenmon Nenkan 2007 (in Japanese).
Watchizu (in Japanese site).
Hinode Hinoiri No Keisan (in Japanese).

Sorry, this calculation needs height of observer and mountain top. Please select radiobutton below and click map above, to input latitude and longitude.Please estimate height from map above, to input height.

Input latitude and longitude of the ovserver.
Input latitude and longitude of the mountain.

Please input latitude, longitude and height of the ovserver.

Please input latitude, longitude and height of the mountain top.

Please input date of your ovservation in order of year {A.D.|Heisei|Showa|Taisho|Meiji} month date. Time difference is difference between local time and UTC. Default values is time difference of Japan.

Set parameter of the refraction of the atomosphere. Default values are ICAO standard atomosphere. If you want to change parameters, please input value of sea level.

Calculate when sun or moon appearsper cent on mountain top, width of mountain top iskilometers and focal length ismilimeters. Please click button below, to get result of the calculation. 'Calculate date of next Diamond Fuji.' provide good date of observation of Diamond Fuji in one year per one click. 'Calculate date of next Pearl Fuji.' provide good date of observation of Pearl Fuji in one year per one click. Predictive picture won't be made and date will be changed one year later, if no good day in next one year. Iluminated phase means the ratio of the ilminated area of the disk to the total area of the disk. It is good to see Pearl Fuji when ilminated phase is near to 100 percent.