The iPhone 13 lineup has been marked up in Japan after the region experiences weakening currency and inflation.
International pricing mainly depends on logistic and currency values. Just about a week ago, the Japanese iPhone 13 was cheaper compared to its US counterpart, with the base iPhone 13 with 128GB storage priced at 99,800 yen, or around $732. Today, the same model and configuration is priced at 117,800 yen, or around $864.

All iPhone 13 models have experienced the same markup, with the largest price hike seen on the iPhone 13 Pro Max model. The 128GB configuration is now priced $1,173 from $989; for comparison, the same iPhone 13 Pro Max is only $1,099.
The reason for the price hike is that the USD had gotten 18% stronger compared to the Japanese yen. Consumers are also in the midst of inflation which affects nearly every commodity.