Most students cannot afford high rents and end up living in substandard housing and have long train or subway commutes. Many institutions rely heavily on private vendors for accomodation. Every student who enrolls in Yamasa is guaranteed appropriate, safe, affordable student housing. Many Japanese educational institutions aim to be, many claim to be, however very few are. Yamasa is one of the few schools with an admissions policy that emphasizes the importance of a diverse student intake - and perhaps the only one that consistently maintains it.
Diversity is essential for successful language training.
With no majority language. That deliberately establishes language diversity in each and every classroom. Yamasa students come from all over the world. Japanese is usually the only medium they can communicate to each other in. It is more than just the language of instruction - it rapidly becomes the language of communication.