Fly from Mumbai to Tokyo. The cheapest round trip flight priced approximately at INR 38,000 to 45,000 (~JPY 65,000) booked in advance on airlines like Air India or Japan Airlines.
A medium-budget hotel with a central location in Shinjuku, great access to metro and restaurants with average nightly rates about JPY 12,000 (~INR 7,000).
Japan's oldest and largest museum focusing on art and history, open 9:30am to 5:00pm (closed Mondays). Don't miss the samurai armor and calligraphy exhibits.
Travel around 2 hours costing approx JPY 5000 with JR Pass or JPY 6000 one-way without. Use the bullet train to Utsunomiya then transfer to local line.