I found the following users who may fit your language exchange criteria:

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/m_a_n_u_18	2022-05-24	Post	10	English, Japanese	English, Russian
u/r3lativo	2022-05-16	Post	8	English (C1), Japanese (B1)	English
u/llxx9y	2022-07-05	Post	8	English, Japanese	English
u/martinabal_	2022-05-21	Post	7	English (B2)	English, Russian
u/24strawberry	2022-06-04	Post	7	English	English, Russian

Please feel free to comment on the above posts to get in contact with their authors.

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