We started by accepting three Cambodian people in 2015. It was the first time for all of our employees to work with foreigners, so we were very nervous about communication. However, the first Cambodian who came was fluent in Japanese and had no trouble communicating with them. Thanks to that, we had no trouble working together.
Furthermore, Sinath, who joined the company after him, is even more fluent in Japanese and learns the job quickly. He is also extremely considerate, so it feels like we have just hired a "competent young Japanese." That said, there was one thing I was careful about when he first joined the company. It's common for foreigners to, while being taught the job, look at the other person's facial expression and say "I understand," even if they don't really understand. I warned him about this once. After that, I don't think there were many problems.
Even at the office, he never sits down until his senior colleagues do. Even while other employees are taking a break, he predicts what tools will be needed for the day's work and organizes his belongings. Regardless of his nationality, he has a wonderful personality as a person. It was really helpful having him here.