Japan is the trip that exceeds every expectation. Tokyo is the world's largest and arguably greatest city — neon, ramen, shrines, and order on an astonishing scale. Kyoto preserves the old Japan of temples, geisha districts, and zen gardens. Between and beyond them: Mount Fuji, Nara's deer, Osaka's food, Hiroshima's memorial, and the Alps.
The bullet train makes it easy: Tokyo to Kyoto in 2 hours 15 minutes, station to station, no airports. A 7-day JR-style rail itinerary — Tokyo, Kyoto, and a day trip or two — is the classic first trip and one of the great travel experiences.
Timing matters. Cherry blossom season (late March–early April) and autumn color (mid-November) are the famous windows — beautiful but crowded and expensive. May, June, and October offer the best balance. Winter brings snow festivals, skiing, and empty temples.
Japan suits everyone: food lovers, culture seekers, families (it's extraordinarily safe and clean), and design lovers. English signage is good on transport; a few phrases and Google Translate cover the rest.