Why does Japanese tourism attract more and more repeat customers?

Japan has its own unique culture, and its tourism environment (health, safety, convenience, humanities, language, transportation, accommodation, play and food) is better, and its cost performance is better. Because the time to go each time is relatively short, there are many places I want to go without time, so there are more and more repeat customers. This is also related to the national plan to revitalize the Japanese economy.