The Japan International Science and Technology Exchange Center (JISTEC) publishes a Japanese email newsletter called "Science Communication". (JISTEC has two locations, in Tokyo and Tsukuba.)
The newsletter includes information about various research-related events that are happening in Tsukuba and it comes out once or twice a month. While all of the information is in Japanese, I think there is a proactive way for foreign researchers to make use of this newsletter even if they can't read Japanese.
Subscribe to the newsletter (http://www.mexttci.go.jp/sci/mailmag/request.html) or look at the copy online (http://www.mexttci.go.jp/sci/). Then, find out some Japanese keywords that are related to your research.
環境 = environment
気候 = climate
温暖化 = global warming, climate change
二酸化炭素 = CO2
Save them in a document (in Japanese) so you can use them later. When a new issue comes out, use your browser's search function to search the issue for the keywords to find out if there is anything happening in your research area. If you find a match to one of your keywords, you can ask someone about the event to see if it would be worthwhile for you to attend.
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