Buong trip ba including air fare and accommodation?
Basta look out for seat sales, and monitor them through travel apps kung gusto mo notifications
May parang ongoing piso sale ata sa ceb pac
Hostel/capsule hotels - almost below 2k or mura pa depende sa location and season
Itinerary pa kung mostly mag tokyo ka lang, majority of the sites can be walked if you plan them correctly and minimal train rides around the yamanote line, then yung pupuntahan mo rin wala entrance fees
Then food mas makakamura ka pag sa supermarket instead na conbini with the same packed lunches, skip breakfast if possible,
30k kung purely travel na-assume ko
Iabot mo na ng 50k for shopping
Golden route is never cheap kasi may shinkansen na kasama