the term of trademark right is 1 years from the date of registration. This period can be extended for another 1 years, but a request for renewal must be made within six months before the expiration of the period. Even after the expiration, if the renewal request is made within six months after the expiration, it can be accepted by paying extra fees.
the renewal fee can be paid in one lump sum at the time of renewal request or in two installments. The first installment (about 75% of the total price) must be paid at the time of renewal request, and the second installment must be paid no later than five years before the trademark right expires. The total cost of the installment option is about 4% higher than the one-time payment option. However, if the trademark owner plans to use the trademark on goods with short life cycle, installment payment may be a good choice, because the owner can decide whether to renew the trademark right at the second payment.