This is mostly the copy & paste from my previous linked lists in the first part of my previous short answer: Did Chinese and Japanese rulers and scientists have any thoughts about what lay to their east in the Pacific?

In short, both the Japanese local elites and the Mongol-Chinese authority (Yuan-Ming) had already set up a kind of tribute collecting/ trade centers mainly with the Ainu and the Nivkh people in NE Eurasia in southern Hokkaido and Tyr-Nurgan respectively before the Russian expansion into the Siberia. The geographical extent of trading networks of the these Ainu-Nivkh peoples mainly confined to Hokkaido - Sakhalin - southern Kuril Islands, not into northern Kuril Islands as well as Kamchatka Peninsula at least before around 1500.

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While much more can always be said, the following posts of /u/ParallelPain and mine might be interesting to you for the possible geographical extent of the Japanese or Ainu expansion in NE Eurasia from the ;ate 14th to the 17th century:

• When did Asia learned about "the discovery of America" and how much did they knew about it?
• Are there any contemporary Chinese, Japanese (etc.) sources on Russia's eastwards expansion, and what did they say?
• /u/ParallelPain writes on the detailed interaction between the Japanese local elite (Clan Kakizaki) and the Ainus in Hokkaido area in: Was there any significant Ainu involvement during the Sengoku Jidai?

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As for the "Chinese (including Yuan)" expansion in the Far Eastern coast (and the Amur River area) and its geographical limit, the following previous posts in this subreddit will offers you some basic information:

• how much of the modern russian far east did the chinese explore?: answered by /u/EnclavedMicrostate and /u/_dk
• How did China react to the Russian conquest of Siberia?: answered by /u/EnclavedMicrostate