For what it's worth, I was familiar with this technique before seeing this or other non-Japanese articles. It doesn't have much relevance for daily life now whi

For what it's worth, I was familiar with this technique before seeing this or other non-Japanese articles. It doesn't have much relevance for daily life now which can explain why very few people seem to have heard of it, but I would imagine that people who study tea ceremony for example would be more likely to know about it.