Japan

There is no fixed time for this. Time varies widely. But, reaching basic fluency (JLPT N4/N5) takes 6 months to 1 year of preparation. For achieving advanced proficiency, you need 3 to 5 years. 

It is not mandatory for Indian students to learn Japanese to study in Japan. You can study here in English language. Yes, universities in Japan prefer candidates who are proficient in Japanese.

The best degrees are mostly in Robotics and Engineering because Japan is famous for machines. Computer Science and MBA is also very popular choice for international students. The Masters degree usually take 2 years to finish. Some business schools have 1 year MBA but mostly it is two years.

The cost is cheaper than in the USA or UK. For National Universities, the tuition fee is around YEN 820,000 per year. If you go to a private university, it is a bit more expensive, like YEN 1,100,000+ per year. You need money for living costs also, maybe YEN 100,000 every month for rent and food.

Yes Japan is a very good place for Masters. The universities like University of Tokyo is top class. It is safe country and you can find jobs easily in technology and engineering. You can study in English language also so no problem if you don't know Japanese. Also MEXT scholarship is there for stude

The top countries where you will not have to worry about paying taxes on your income are the Bahamas, Bahrain, Bermuda, Cayman Islands, Kuwait, Maldives, Monaco, Nauru, Oman, Qatar, Saint Kitts and Nevis, Somalia and the United Arab Emirates (UAE).

Check eligibility requirements such as academics, proficiecny in Japanese and any other requirements such as submission of application forms, LOR, age and health certificates, etc.

You may have to sit in written tests and interviews which are usually conducted at Japanese embassy of applicant's home

Yes, Indian citizens require a visa to travel to Japan. You must apply for a Japan tourist visa before travelling.

Japan is generally more expensive for Indians than India. Especially for groceries and dining out. Costs are manageable with budgeting and choosing affordable cities. Monthly expenses for a student often range from YEN 80,000 to YEN 150,000. It totally depends on spending habits.

Japan is much cheaper than USA. An Indian student needs around 50 to 60 thousand Indian rupees as monthly expenses. For USA, this can go up to 2 lakhs INR.