While Japan uses many universal symbols to indicate mobility issues, there are some unique to transport and public life.
Read more on this blog about Marks to indicate medical conditions and disabilities.
https://www.city-cost.com/blogs/TonetoEdo/wmPZd-living_health
Great! I didn't know about a few of these marks. I like these educational posters. Lately I finally understood the need/use for those big sinks in toilets for disabled ppl: it's for ppl who need to wash a stomach pouch (make sense!) thanks to one of those. The more you know!
These symbols are great for other countries too. Other countries should consider using these.