That's been my point: the only growth happening in Japan for console (if it's been happening) is due to Nintendo. Microsoft are absolutely not pulling their weight there and PlayStation has dropped noticeably because software sales for PS5 have been generally abysmal. In a few weeks it'll start tracking behind PS4 in unit sales as well.
Nintendo alone can't overperform to the level of getting the console side of the market to grow in Japan when PlayStation and Xbox are unappealling offerings there. My bigger question is, will what's happening in Japan start happening in other markets where console is generally seen as more stable? Like in various European countries, will it start happening? Because we already know in parts of Europe PS5 is falling behind PS4 in LTD; in terms of total software revenue it's not as easy to say.
There is little really threatening growth of PC in those places, however, and that growth will likely come at some expense of PlayStation future market growth, or even retaining typical market share, in the same territories (Xbox is already dead in Europe aside UK and even there it's not doing too well). Nintendo might be affected a bit, but not nearly to the same degree. It'd be relative to the effect PC has had on mobile in Japan, which is to say...within a margin of error.