It's easy to spout off the logic behind it, but the costs for three thick volumes is startlingly high. If you employ a Japanese designer to get that "Japanese feeling," you're talking about another big lump of money.
道理說來容易，但厚厚三本，成本算起來令人咋舌；如果要「抓住日本人的感覺」而請日本設計師設計，又是另一筆可觀費用。