Recently, I tried comparing various e-book stores, and I realized that there really are differences depending on the service. Especially, the initial discount and the benefits of continuous use seem to make a big difference.

Personally, if you're going to use it long-term, ebookjapan, which allows you to decorate your bookshelf with a spine, is quite good. They also have weekend campaigns, so if you're planning to buy in bulk, it's a good target. On the other hand, if you want to read a lot right now, DMM Books' 25% point cashback can't be missed. The fact that it covers manga and light novels is also a big plus.

What I noticed from comparing e-book stores is that choosing based solely on price can sometimes lead to regret. dブック offers monthly point rewards, and both the first-time and ongoing discounts are affordable, so if you're planning long-term use, it's not a bad choice. However, the lack of background color adjustment and marker functions makes it less comfortable to read.

The flexibility of the bookshelf and search functions are surprisingly important too. Comic Cmoa has a rich filtering search, making it easy to find your favorite books. Meanwhile, Reader Store offers high discounts if you're just buying one book, but it's not suitable for bulk purchases.

What I learned from comparing e-book stores is that the best service depends on how you use it. Whether you prioritize initial discounts, long-term use, or readability—your choice of service will vary greatly. Since many services offer free samples, I think trying them out first is the best way.