Days 1-2: Tokyo and Mt. Takao
Day 1: Arrive and prep gear. Visit Montbell or The North Face store in Shinjuku (outdoor gear at Japan-exclusive prices). Evening: climbing gym session at B-Pump Ogikubo (¥2,200) — Japan's largest indoor climbing wall. Day 2: Mt. Takao (599m) from Shinjuku in 50 minutes. Hike Trail 1 (paved, 90 min up) or the more natural Trail 6 (stream crossing, 90 min). From the summit, continue to Mt. Jinba (3 hours, rewarding ridge walk with Fuji views). Beer garden at Takao summit (April-October). For more challenge: Mt. Mitake and the rock garden trail (2 hours from Shinjuku, full day).
Tip: Spring and autumn are best for Tokyo hiking — summer is brutally humid on trails. Always carry 2L of water per person and start early.
Days 3-4: Japanese Alps
Day 3: Shinkansen to Nagano (80 min), bus to Kamikochi (2 hours). This glacial valley at 1,500m is the gateway to Japan's Northern Alps. Easy walks along the crystal Azusa River to Kappa Bridge and Taisho Pond (2-3 hours). Stay at a mountain lodge (from ¥10,000 with meals). Day 4: Hike to Dakesawa Wetland (3 hours round trip, moderate) for alpine marsh and mountain panoramas, or attempt Mt. Yari-ga-take — Japan's Matterhorn (full day, expert level, mountain hut overnight required). In winter (December-April): ski Hakuba Valley instead — 10 connected resorts with Olympic-grade terrain and guaranteed powder.
Tip: Kamikochi is only open mid-April to mid-November and private cars are banned — bus access only. Book mountain huts in advance during summer hiking season (July-September).
Days 5-6: Canyoning and Rafting in Minakami
Head to Minakami in Gunma Prefecture (Shinkansen to Jomo-Kogen, 70 min from Tokyo). This mountain town is Japan's adventure sports capital. Day 5: Canyoning in the Nishi River gorge — slide down natural waterslides, jump from cliffs into pools, and rappel down waterfalls (¥8,000-¥12,000 for half-day with guides and equipment). Day 6: White-water rafting on the Tone River — class III-IV rapids in spring snowmelt season (April-June), mellower class II in summer (¥7,000-¥9,000). Alternatively: bungee jump from the Sarugakyo Bridge (62m drop, ¥12,000) or paragliding over the valley (¥12,000 tandem).
Tip: May-June offers the biggest rapids from snowmelt. Summer is warmer but calmer water. Canyoning operators provide full wetsuits and helmets — bring only swimwear and towel.
Days 7-8: Okinawa Diving
Fly to Okinawa (2.5 hours from Tokyo). Day 7: Introductory dive at Blue Cave near Cape Maeda (¥12,000 for certified divers, ¥15,000 discover scuba) — sunlight entering the cave creates an ethereal blue glow. Visibility regularly exceeds 30m. Day 8: Boat dive to Kerama Islands (¥15,000-¥18,000 for 2 dives) — encounter sea turtles, manta rays, and coral gardens teeming with tropical fish. For certified divers, the Yonaguni Underwater Ruins (mysterious stepped stone formations) are Japan's most extraordinary dive site. Water temperature: 22-28 degrees year-round (3mm wetsuit sufficient).
Tip: Non-certified partners can try 'discover scuba' (no certification needed) at Blue Cave while certified divers do the full dive — both enjoy the same location.
Days 9-10: Yakushima or Kumano Kodo
Option A — Yakushima: Fly from Okinawa (or Osaka, 70 min). Hike to Jomon Sugi — a 7,200-year-old cedar tree through ancient moss-covered forest that inspired Princess Mononoke (10 hours round trip, strenuous but non-technical). Shiratani Unsuikyo ravine (3-5 hours, moderate) offers the Ghibli-esque forest without the full-day commitment. Option B — Kumano Kodo: Ancient pilgrimage trail in Wakayama. The Nakahechi route from Takijiri-oji to Hongu takes 2 days (stay in mountain onsen villages). Both options combine physical challenge with spiritual forest immersion. Total adventure budget: ¥180,000-¥250,000 for 10 days.
