Thank you for viewing. This item was purchased when I was a student... I remember realizing something was off about a year after using it, when I carefully examined the backs of the tiles... I recently found it while going through my parents' house and felt nostalgic, so I'm listing it with some information. What makes it unique is that there's a reason... It's a bit of a "flawed" item, but you really have to look closely to notice it. The backs of the 1-pin and 7-pin tiles appear slightly thinner, rounder, and smaller. Especially the 1-pin (see photo 5). It's really just a feeling... so it's not easily noticeable, and it doesn't hinder gameplay at all. Photos 4, 6, 7, and 8 show the process of shuffling 36 cylinder tiles in two rows and searching for the 1-pin and 7-pin. It took about 2 minutes, but I found 8 of them right away. However, when an opponent calls a reach, you might be the only one who knows if they have a 1-pin or 7-pin... Although there aren't many situations where this would be advantageous, it might be helpful depending on the situation... How you use this is up to you. Also, the corner of the back of one West tile is slightly chipped, but I knew about this from the time of purchase. I've played over 300 games, and it never affected the outcome. My work schedule is irregular and busy, so I have varying times to check messages, making negotiations difficult. I plan to lower the price by 100 yen at a time and withdraw the listing when it reaches the lower limit. Thank you for your understanding.