Is the Japan Rail Pass worth it?

Only if you are doing extensive travel beyond the Tokyo-Kyoto-Osaka loop. Use a JR Pass calculator to be sure.

Do I need to speak Japanese?

No. Major tourist areas and transit hubs have extensive English signage. Learning 'Sumimasen' (Excuse me) and 'Arigato' (Thank you) goes a long way.

Can I use credit cards everywhere?

More places accept cards now, but you must carry cash for ticket machines, temples, and small neighborhood ramen shops.

How to plan a 14-day trip to Japan

Focus your two weeks on the 'Golden Route'—Tokyo, Kyoto, and Osaka—to maximize sightseeing and minimize transit time. Use the Shinkansen (bullet train) to connect these hubs, and reserve your accommodation at least three months in advance to secure reasonable rates.

Map your route by hub. Stick to three main bases: Tokyo (5 days), Kyoto (5 days), and Osaka (4 days). Don't try to cram in Hokkaido or Kyushu; you'll spend your entire vacation on trains.
Calculate your rail pass. Don't buy a JR Pass automatically. Use a 'JR Pass Calculator' online. If you are only doing a round trip between Tokyo and Kyoto, individual tickets are often cheaper than the 14-day pass.
Book domestic transit. Download the SmartEX app to book Shinkansen tickets in advance if you want guaranteed reserved seating during peak travel weeks, though you can usually buy them at station kiosks on the day of travel.
Secure internet access. Order a pocket Wi-Fi device to pick up at the airport or buy an eSIM (like Airalo or Ubigi) before you land. Navigating Japanese train stations without Google Maps is nearly impossible.

Is the Japan Rail Pass worth it?: Only if you are doing extensive travel beyond the Tokyo-Kyoto-Osaka loop. Use a JR Pass calculator to be sure.
Do I need to speak Japanese?: No. Major tourist areas and transit hubs have extensive English signage. Learning 'Sumimasen' (Excuse me) and 'Arigato' (Thank you) goes a long way.
Can I use credit cards everywhere?: More places accept cards now, but you must carry cash for ticket machines, temples, and small neighborhood ramen shops.