If possible, replace some CN (or TW/HK) glyphs with unreleased JP glyphs

I request to replace some (but not all) CN/TW/HK glyphs, which are the only glyphs for all regions, with unreleased JP glyphs based on Kozuka Gothic because the latter are generally better designed. It also probably will [solve some slight discrepancies with regards to the radical component designs](https://github.com/adobe-fonts/source-han-sans/issues/410).

The reason why I am opening this issue is because even in v1, for some characters, there were no JP glyphs, therefore CN glyphs are the only glyphs used for JP/KR. But a good amount of them are not really well-designed, in fact Changzhou Sinotype did the CN/TW glyphs very quickly, which results in a generally poorer quality of glyphs. Which is why I am asking Adobe to use their unreleased JP glyphs based on Kozuka Gothic and replace the CN/TW/HK glyphs, if possible.

I had gone through the AI0-SourceHanSans and AI0-SourceHanSerif lists and roughly managed to filter out some glyphs that never had JP glyphs. I would very much prefer if about 90% of the Adobe-Japan1 character set for SHS are using JP glyphs, except for 的 (U+7684) and some other CN/TW/HK glyphs which are not too much different from the unreleased JP glyphs.

One example is 狙 (U+72D9), it is a CN glyph, because of the unnecessary CJK radical design changes done by Changzhou Sinotype, therefore it looks a bit ugly.

I also pointed out [the 心 component in some glyphs](https://github.com/adobe-fonts/source-han-sans/issues/421), [書 (U+66F8)](https://github.com/adobe-fonts/source-han-serif/issues/175), [狅 (U+72C5)](https://github.com/adobe-fonts/source-han-sans/issues/420), [甭 (U+752D, on Serif)](https://github.com/adobe-fonts/source-han-serif/issues/159#issuecomment-1562746054) and 悟 (U+609F), see below. So maybe next time if I find such issues they go to this page.

And yes, it also concerns [restoring v1 JP glyphs to replace CN glyphs](https://github.com/adobe-fonts/source-han-sans/issues/329) since there are virtually no parts that require a regional design difference, although I think at this point the list over there may need updating.

For Serif, similar issues apply.

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**UPDATE:** Whoops, looks like I already mentioned this issue earlier in #410, but I will move the content here.

> I think some glyphs that are part of Adobe-Japan1 (e.g. 悟, U+609F) are using the CN glyphs (as the only glyph, or as the default glyph if TW/HK forms exist), which makes it look a tiny bit inconsistent when using the JP/KR locales.
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> I don't know what would be the action taken for other similar glyphs, as I have not thoroughly checked the other characters, but in the case of 悟 (U+609F), it should use Kozuka Gothic as the base, make it a JP glyph, map to all regions and remove the CN and TW glyphs (which the latter is designed differently from Kozuka Gothic). Or if standards require, make the CN glyph the only glyph for the CN locale.

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**UPDATE 2:** I have new insights based on my recent email correspondence with someone formerly involved in this project. This is part of their reply:

It also confirms that Sinotype is no longer involved in the project.