Special Training colleges in Japan

I am going to Japan on office posting for next 3 years. Please tell me some good special training colleges in Japan, so that while staying there I can upgrade myself with some new skills.

In Japan special training schools offer vocational-technical education. Among special training schools, those offering specialized courses are called special training colleges and are treated as higher educational institutions. The Students attend these training schools for one to three years, normally for two years. This training help them to acquire the knowledge and skills necessary for their chosen vocation and for promotion in future life. For admission to a Special Training College, except those giving training in Japanese language, you have to meet one of the following three criteria and possess the Japanese language ability required to study in the special training college:

Studied 6 months or more at a Japanese-language institute accredited by the Association for the promotion of Japanese language Education and notified by the Minister of Justice.

Certified at Level 1 or 2 of the Japanese Language Proficiency Test given by the Association of International Education Japan and the Japan Foundation.

Received at least one year of education at a Japanese elementary, junior or senior high school.
For further information you may log on to (website of Metropolitan Tokyo Professional Institution Association).

Graduates of post secondary courses of special training colleges must complete at least 1,700 hours of instruction, to call themselves 'qualified specialists'.

Soft skills such as cultural awareness and strong writing capabilities are also very important for getting success while getting vocational training in Japan.