The total cost was ¥38,340, including ¥9,100 for 4 tires, ¥265 for disposal of used tires for 4 tires, and ¥880 for labor to replace one good tire with a spare tire. This included labor, air valve replacement, balancing, rotation, puncture repair, and nitrogen gas refilling. There was also a campaign to give away a Costco prepaid card worth ¥8,000, so I ended up replacing my tires for just over ¥30,000. It might be about 5 years from now, but I'd like to consider replacing my tires at Costco again next time!