Notice how that's all for show too. Relatedly, Japanese people often don't work harder than Americans, they simply stay at the office longer. I also prefer what lack of formal attire signals: in Japanese workplaces, the more senior, the more respect for their ideas, regardless of whether the idea is actually better. Formal attire legitimizes their seniority but I'd rather have a meritocratic system of vetting ideas, and informality signals that too.