Nowadays, most Japanese individuals have chairs in their homes, however this may be more for aesthetic and cosmopolitan reasons than for any practical gain. Some homes still have solely this type of room, with no seats, and they are also frequent in hotels and restaurants. In modern houses, chairs are used to sit in while having a meal or visiting friends, but they are rarely seen in kitchens because most people cook at a counter or table instead. Even in shops, customers usually sit on tatami mats on floors rather than using chairs. Only elders might live in completely empty houses without any furniture whatsoever. In conclusion, yes, the Japanese do use chairs. However, they are not used in daily life like in the West. They are used only in rooms where you would eat, drink, or socialize with friends and family.