¥1500 と€15 は、同じだと思います。 Dont see the value of money in exchange rate, but the money power. The base problem is the total cut off salary from brut to net is so high in France that can reach 65%, but only 25-30% in Japan. I worked in Japan for some years and gaining ¥300,000 salary feels like having €3,000 (after living in France for 2 years now) So if you have €3000 as salary in France, spending €15 will feel the same as spending ¥1500 when having salary net ¥300,000 in Japan