Amazon's distribution in Japan is charged by piece, and each piece (! ) The book delivery fee+typesetting fee is 700 yen.
In this case, it is suitable to buy a set of books in Amazon, such as comic book library sets, and a set of dozens of books can be regarded as one, which is particularly cost-effective. Amazon's delivery time is also very fast. But one book at a time is a bit expensive.
Transshipment is charged by weight. If all the books you buy are one by one, they are suitable for transshipment. Generally speaking, delivery can be combined within 5 cases. Of course, the book collection is too heavy, so I recommend Amazon. Time is not urgent, there must be transshipment. I took a transshipment sal last month, and it will take about 7/8 days to arrive. I use Japan Tesco transshipment, and a friend recommended Japan transshipment. Both will do. Look at your own choice.