Is it possible to visit Tokyo without knowing any Japanese?

Yes. Most train stations, ticket machines, and major tourist sites have English language options. Google Translate's camera feature makes reading menus easy.

For staying strictly within Tokyo, no. A JR Pass is only worth the cost if you are taking multiple long-distance Shinkansen bullet trains to other cities.

Tokyo on a budget: How to keep costs under $80 a day

You can comfortably explore Tokyo for $75–$80 USD per day by staying in capsule hotels or hostels, utilizing the extensive subway system instead of taxis, and eating at convenience stores or budget-friendly chain restaurants. Prioritize free observation decks and parks to minimize entertainment costs.

Book budget-friendly accommodation. Look for capsule hotels in areas like Asakusa or Ueno. You can consistently find clean, safe beds for $30–$40 per night if you book at least 3 weeks in advance.
Master the public transport. Buy a Welcome Suica or Pasmo Passport card immediately upon arrival at the airport. Avoid taxis entirely, as they are prohibitively expensive; stick to the JR Yamanote line and subway trains, which will cost you roughly $7–$10 per day.
Eat like a local (and a student). For breakfast, grab a $3 rice ball (onigiri) and coffee from 7-Eleven or Lawson. For lunch and dinner, seek out 'shokudo' (casual eateries) or chains like Matsuya or Yoshinoya, where a full meal costs $6–$9.
Choose free attractions. Skip the paid observation decks and head to the Tokyo Metropolitan Government Building in Shinjuku for free city views. Walk through Yoyogi Park, the Imperial Palace East Garden, and Meiji Jingu Shrine, which cost nothing.

Is it possible to visit Tokyo without knowing any Japanese?: Yes. Most train stations, ticket machines, and major tourist sites have English language options. Google Translate's camera feature makes reading menus easy.
Do I need a JR Pass?: For staying strictly within Tokyo, no. A JR Pass is only worth the cost if you are taking multiple long-distance Shinkansen bullet trains to other cities.