E-book services, which one should I choose after all? I compared them and found some surprising insights.

If you plan to use it continuously, ebookjapan is the clear winner. The discounts on the second and subsequent purchases are much better than others, and weekend campaigns are plentiful. Being able to line up your bookshelf by spine is also a big plus. On the other hand, if you want to read a large volume cheaply right now, DMM Books is the way to go. Their first-time discount is significant, and manga and light novels always offer 25% points back.

If cost is your priority, d-book is also a candidate. Both the first purchase and subsequent ones are inexpensive, making it suitable for cost-conscious users. However, it has fewer features. If ease of reading is more important, honto and Kinoppy are also good options.

All services generally have popular titles, so choosing based on discounts and features is the right approach. Are you a "cost-saving" person? Or a "ease of reading" person?