Sometimes I chuckle with, sometimes laugh at Thai’s use of printed English. Usually I’m charmed by the Japanese’s use. From a Nagoya ryokan’s web site:
The room charges depends upon how many will be staying in one room, and frankly speaking, the cheaper per capita, the smaller. We would say, if you are a couple having suitcases, up to two people would fit in one room. If you are backpackers, and just need a space to sleep, three room should be okay.* However if you are a group of three who has also carrying large suitcases, we would not recommend triple arrangement.
*Please note that we use same-sized rooms either for a single, twin and triple rooms, therefore if you are making a triple room, please note that the room can be VERY VERY SMALL!!