Google translated
their website from Japanese to English for me instantaneously.
Here is their schedule (or part of it):
Some of these events have links that provide English versions.
Date Event Place
08/22
Navi gation-instructor (tentative name) workshop Saitama Prefecture
08/23
35th Keiyo Orienteering Club Chiba Prefecture
09/05 - 09/06
Instructor training workshop Kyoto
09/05
JOA 8th camp (Fuji district plans)
09/12
March 2nd controller workshop FY 27 Tokyo
09/23
35th University of Tsukuba orienteering tournament Ibaraki Prefecture
10/04
Yatsugatake Fujimi plateau tournament Yamanashi Prefecture
10/10
2015 blue forest Tsurunosato 2Days orienteering competitions Aomori Prefecture
10/11
2015 blue forest Tsurunosato 2Days orienteering competitions Aomori Prefecture
10/18
The 20th Kyoto University, Kyoto Women's University orienteering competitions Kyoto
10/31
8th All Japan sprint orienteering competitions Nagano Prefecture
11/08
The 24th All-Japan relay O tournament Shiga Prefecture
11/14 to 11/15
Instructor training workshop Niigata Prefecture
11/21
Park O tour in Kansai 2015 Kyoto convention Kyoto
11/22
All Japan Middle orienteering competitions Hyogo Prefecture
12/05 to 12/06
Instructor training workshop Tokushima Prefecture
02/21
Japan ski orienteering sprint tournament
02/28
Park O tour in Kansai 2015 Hyogo tournament Hyogo Prefecture
03/12 to 03/13
Japan ski orienteering competitions
March 20, 2009,
42nd All Japan Orienteering tournament
Then for instance the all Japan Middle Distance Champs on Nov 22 I clicked on that link that took me to a page where they provided a link to an English translation.
Hope that information is what you were seeking.