How do you buy TOTO at the counter?

Could you please elaborate on the process of purchasing TOTO at a counter? I'm interested in understanding the steps involved, such as where I would go to initiate the transaction, what forms of payment are accepted, and whether there are any specific requirements or restrictions I should be aware of. Additionally, is there a specific time of day or week when purchasing TOTO at the counter is more convenient or efficient? Thank you for your assistance.