SEO in the Japanese market is not much different from that of the world standard. There is no doubt that the motto is to create content that is in line with Google’s ideal of “providing valuable content to users”.
In other words, the ratio of search engines (platforms) used will be slightly different. In Japan, there are many Yahoo! JAPAN users under SoftBank for a long time, so many people use Yahoo as their main search engine.
However, recently, Yahoo also uses Google’s search engine as it is, so it is practically necessary to take SEO measures = to display it on Google. In addition to Google and Yahoo, some people use Bing provided by Microsoft, but only a few percent.