Trademark registration costs at least 100,000 yen per case, including the fee for patent attorneys and the tax for the Japan Patent Office. At first glance, it may seem expensive, but since trademark registration is valid for 10 years, it can be said that it is a product (durable consumer goods) that will be consumed on 10 years.
In other words, it costs only 10,000 yen per year and 833 yen per month. It's much cheaper than the monthly charge for Japanese mobiles.
At 833 yen, ramen is about that price at a famous ramen shop. If you are a business owner who wants to register a trademark, reduce the number of times you go to a ramen shop once a month. You can also get your health and have two birds with one stone.