THE CHALLENGE RACE YOKOHAMA 4 in 2025 | Yokohama Marathon

Overview

THE CHALLENGE RACE YOKOHAMA 4 in 2025, held on Saturday, December 20, 2025, is a Japan Association of Athletics Federations (JAAF)-certified race on the Tsurumi River Right Bank Riverside Circular Course, with registration at the Gazebo on the east side of Shin-Yokohama 3-chome Park (3-22-10 Shin-Yokohama, Kohoku-ku, Yokohama 222-0033, Kanagawa Prefecture). Organized by RDC RUN CLUB and THE CHALLENGE RACE Executive Committee, supervised by the Yokohama City Athletics Association, this event offers Full Marathon (42.195km), 30km, Half Marathon (21.0975km), 10km, 5km, and 1 Mile events on a flat 10km loop course (<3m elevation), ideal for personal bests (PBs). It features 13 pacer groups (equivalent to Full Marathon paces of 2:30:00–4:30:00, 3:33–6:23 min/km, minimum 25km), hydration and gel stations (water at three points per lap, Amino Vital GOLD and Amino Shot Perfect Energy gels at one), and a capacity of 1,200 participants (300 Full Marathon, 200 30km, 300 Half Marathon, 200 10km, 200 5km, 300 1 Mile; closes at 200 total entries, likely a typo for 1,200). Registration is open from July 16, 2025, to December 16, 2025, via https://yokohama-run.rdc-run.com, with fees from 3,300 yen (5km, 1 Mile) to 11,000 yen (Full Marathon), including bibs, timing chips (return mandatory, 10,000 yen fee if lost), record certificates (paper on-site or emailed within 3 days), and Aioi Nissay Dowa Insurance (first aid coverage; hospitalization/outpatient fees TBD). Access is a 10-minute walk from Shin-Yokohama Station (JR Yokohama Line/Shinkansen), with paid coin parking nearby (crowded, arrive early). Unlike the larger Yokohama Marathon (October 26, 2025,,), this race focuses on a smaller, community-driven event with a flat, fast course, ideal for record-breaking. Described on X as “a flat, fast course with great pacer support,” it’s perfect for runners aged elementary school and older aiming to break records or enjoy a scenic run along the Tsurumi River, with views of Mt. Fuji on clear days ().

Why Attend

• JAAF-Certified Flat Course: 10km loop (<3m elevation) along Tsurumi River, certified by JAAF, ensuring accurate distances and official times for PBs (,).

• Pacer Support: 13 pacer groups (equivalent to Full Marathon paces: 2:30:00–4:30:00, 3:33–6:23 min/km, minimum 25km) for beginners to elite runners ().

• Hydration & Gels: Three stations per 10km lap (water, Amino Vital GOLD; one with Amino Shot Perfect Energy gels), supporting energy needs ().

• Inclusive Eligibility: Open to elementary school age and older (no upper limit), welcoming beginners and advanced runners ().

• Participant Perks: Bibs, timing chips, record certificates (paper or emailed), completion medals (assumed based on), and insurance. Warm-up until 5 minutes before start.

• Accessible Venue: 10-minute walk from Shin-Yokohama Station, near Nissan Stadium and hotels (e.g., Shin-Yokohama Prince Hotel). Coin parking nearby (crowded, ~1,000 yen/day).

• Safety & Support: JAAF rules, staff, first aid, and insurance ensure safety. Timing chips (return mandatory) for accurate results. Luggage storage (plastic bags, no valuables).

• X Buzz: “Loved the flat course and pacers—PB city!” – 2024 runner. “Great for my first 30km, gels were a lifesaver!” – X user.

Event Details

Events and Courses

Saturday, December 20, 2025 – Race Events:

• Venue: Tsurumi River Right Bank Riverside Circular Course, registration at Gazebo, Shin-Yokohama 3-chome Park (3-22-10 Shin-Yokohama, Kohoku-ku, Yokohama 222-0033).

• Schedule:

  • Saturday, December 20, 2025:

    • 8:00–9:00 AM: Registration (bib, chip pickup).

    • 9:10–9:20 AM: Opening Ceremony.

    • 9:25 AM: Line-up (by pace group, fastest first, for Full Marathon, 30km, Half Marathon, 10km, 5km).

    • 9:30 AM: Start (Full Marathon, 30km, Half Marathon, 10km, 5km).

    • 9:35 AM: Start (1 Mile).

    • ~2:00 PM: 1 Mile finish (~25 minutes, based on 5:00 min/km pace).

    • ~2:10 PM: 5km finish (40:00 limit).

    • ~3:00 PM: 10km finish (90:00 limit).

    • ~3:45 PM: Half Marathon finish (2:15:00 limit).

    • ~4:42 PM: 30km finish (3:12:00 limit).

    • ~6:00 PM: Full Marathon finish (4:30:00 limit).

• Course Features (based on, https://yokohama-run.rdc-run.com):

  • Full Marathon (42.195km, <3m elevation):

    • Route: (Start → 5km turnaround → Start) x4 + final 2.195km. See https://yokohama-run.rdc-run.com for map.

    • Details: Time limit: 4:30:00. Checkpoints every 5km (e.g., 5km: 32:00, 40km: 4:18:00). Capacity: 300. Timed. Ages elementary school+.

  • 30km:

    • Route: (Start → 5km turnaround → Start) x3. Time limit: 3:12:00. Checkpoints every 5km. Capacity: 200. Timed. Ages elementary school+.

  • Half Marathon (21.0975km):

    • Route: (Start → 5km turnaround → Start) x2 + final 1.0975km. Time limit: 2:15:00. Checkpoints every 5km. Capacity: 300. Timed. Ages elementary school+.

  • 10km:

    • Route: Start → 5km turnaround → Start. Time limit: 90:00. Capacity: 200. Timed. Ages elementary school+.

  • 5km:

    • Route: Start → 2.5km turnaround → Start. Time limit: 40:00. Capacity: 200. Timed. Ages elementary school+.

  • 1 Mile (1.609km):

    • Route: Start → 0.8045km turnaround → Start. Time limit: None (assumed ~25:00 based on 5:00 min/km pace). Capacity: 300. Timed. Ages elementary school+.

  • Format: JAAF-certified competitive race with timing chips (return mandatory, 10,000 yen fee if lost). 10km loop with hydration stations (three per lap: water, Amino Vital GOLD; one with Amino Shot Perfect Energy gels). Pacers for Full Marathon, 30km, Half Marathon (13 groups, equivalent to Full Marathon paces: 2:30:00–4:30:00, 3:33–6:23 min/km, minimum 25km; may stop early if unsafe). No pacers for 10km, 5km, 1 Mile. No traffic restrictions; follow traffic laws (single-file, avoid side-by-side). Line-up 5 minutes before start (by pace for Full Marathon, 30km, Half Marathon). Staff, guides, first aid on-site. Rain or shine; canceled only for severe weather (TBD by December 19). Warm-up until 9:25 AM (5 minutes before start). Certificates (paper on-site or emailed within 3 days). Mt. Fuji views on clear days ().

  • Safety: JAAF rules, staff instructions mandatory. No dangerous items, inappropriate clothing (e.g., political/religious, offensive), loud devices, or obstructions (e.g., stopping, soliciting). Report injuries/accidents to staff ([email protected]) or call 110/119. Insurance covers first aid (hospitalization/outpatient fees TBD). Health check required pre-race (TBD, likely temperature check; 37.5°C+ bans participation). No accompanying family/guide dogs unless approved (e.g., visually impaired with ≤2 escorts). Withdraw if instructed (health/safety).

  • Support: Hydration/gels (water, Amino Vital GOLD at three stations; Amino Shot Perfect Energy at one), first aid, staff, guides, changing rooms, restrooms at venue. Luggage storage (plastic bag, name visible; no valuables, organizers not liable for theft/loss). Coin parking nearby (crowded, ~1,000 yen/day; arrive early).

Eligibility

• Age: Elementary school age and older (no upper limit), healthy, able to complete chosen event safely within time limits (Full Marathon: 4:30:00, 30km: 3:12:00, Half Marathon: 2:15:00, 10km: 90:00, 5km: 40:00, 1 Mile: none).

• Equipment: Running gear (shoes, clothing for weather). Carry bib, timing chip (return mandatory), health insurance card/copy. Personal insurance recommended (police certificate may be needed for claims). No rentals.

• Rules:

  • JAAF-certified; follow 2025 JAAF rules, event regulations (no dangerous/inappropriate clothing, political/religious items, loud devices, obstructions, soliciting, or unapproved escorts). Minors need parental consent. Warning for violations; severe/repeated violations lead to disqualification (no certificate, future entry may be refused).

  • Checkpoints every 5km for Full Marathon, 30km, Half Marathon (e.g., 5km: 32:00, 30km: 3:12:00); late/unsafe runners stopped. Report accidents/withdrawal to staff ([email protected]) or 110/119. Health declaration (no alcohol, report allergies/conditions).

  • Insurance: Aioi Nissay Dowa (covers first aid; hospitalization/outpatient fees TBD). Organizers not liable unless grossly negligent. Participants cover medical expenses post-first aid, third-party damages.

• Physical Condition: Train for chosen distance (Full Marathon/30km: advanced, Half Marathon: intermediate, 10km/5km/1 Mile: beginner-friendly). Withdraw if unwell (report to staff).

Capacity

• Total: 1,200 (300 Full Marathon, 200 30km, 300 Half Marathon, 200 10km, 200 5km, 300 1 Mile). Closes at 1,200 entries (web states 200, likely a typo) or December 16, 2025 (first-come, first-served).

• Minimum Tickets: 1 ticket per participant.

• Maximum Tickets: 1,200 total entries. Contact [email protected] for vacancies.

• Note: Web’s 200 total entry limit () conflicts with event-specific caps (1,200 total); assumed typo based on similar events (e.g.,).

Features

• Course Highlights: Flat 10km loop (<3m elevation) along Tsurumi River, ideal for PBs. Mt. Fuji views on clear days (). JAAF-certified for official times.

• Pacers: 13 groups for Full Marathon, 30km, Half Marathon (equivalent to Full Marathon paces: 2:30:00–4:30:00, 3:33–6:23 min/km, minimum 25km; may stop early if unsafe). No pacers for 10km, 5km, 1 Mile.

• Hydration & Gels: Three stations per 10km lap (water, Amino Vital GOLD; one with Amino Shot Perfect Energy gels).

• Participation Prizes: Bib, timing chip, record certificate (paper or emailed), completion medal (assumed based on).

• Services:

  • Hydration/Gels: Water, Amino Vital GOLD (three stations), Amino Shot Perfect Energy (one station).

  • Support: Pacers (Full Marathon, 30km, Half Marathon), staff, guides, first aid, changing rooms, restrooms. Luggage storage (no valuables, not liable for theft/loss).

  • Parking: Coin parking near venue (crowded, ~1,000 yen/day; arrive early, check locations independently).

  • Insurance: Aioi Nissay Dowa (first aid; hospitalization/outpatient fees TBD). Report injuries during event (insurance void otherwise).

• Media: Photos, videos, names, ages, prefectures used in media (e.g., website, news, https://yokohama-run.rdc-run.com). Organizers own rights; may be used commercially.

• Safety: JAAF rules, mandatory checkpoint checks, staff/guides. No traffic restrictions; follow traffic laws. Event canceled for severe weather (TBD by December 19).

Ticket Information

Event Date & Time

• Venue: Tsurumi River Right Bank Riverside Circular Course, registration at Gazebo, Shin-Yokohama 3-chome Park.

• Date: December 20, 2025 (rain or shine; canceled for severe weather, TBD by December 19).

• Schedule:

  • Saturday, December 20, 2025:

    • 8:00–9:00 AM: Registration (bib, chip pickup).

    • 9:10–9:20 AM: Opening Ceremony.

    • 9:25 AM: Line-up (by pace for Full Marathon, 30km, Half Marathon).

    • 9:30 AM: Start (Full Marathon, 30km, Half Marathon, 10km, 5km).

    • 9:35 AM: Start (1 Mile).

    • ~6:00 PM: Event end (Full Marathon finish).

• Duration: ~10 hours (8:00 AM–6:00 PM).

• Note: Bring ID, health insurance card/copy, running gear. Temperature check at registration (TBD, likely 37.5°C+ bans participation). Check-in on event day. No late starts. Return timing chip (10,000 yen fee if lost).

Purchase Channels

• Jasumo Tickets: Contact https://jasumotickets.com/contact for bilingual support. Submit email, event, target time, personal best, emergency contact (name, phone).

• Official Website: Register at https://yokohama-run.rdc-run.com (closes December 16, 2025). Payment via credit card/convenience stores (fees TBD, ~500 yen). Submit email, target time, personal best, emergency contact.

• Note: Participation notice emailed ~December 17, 2025. Contact [email protected] if not received or for vacancies.

Rules

• Application:

  • July 16, 2025–December 16, 2025; closes at 1,200 entries. No refunds post-payment or for cancellations (personal, severe weather). No proxy/substitute runners.

  • Submit email, event, target time, personal best, emergency contact (published in results). Health declaration (no alcohol, report allergies/conditions). Minors need parental consent.

• Course Rules:

  • JAAF-certified; follow 2025 JAAF rules, event regulations (no dangerous/inappropriate clothing, political/religious items, loud devices, obstructions, soliciting). Line-up by pace (9:25 AM). Checkpoints every 5km for Full Marathon, 30km, Half Marathon; late/unsafe runners stopped. Report accidents/withdrawal to staff ([email protected]) or 110/119. Temperature check at registration.

  • No unapproved escorts (e.g., family, guide dogs; visually impaired may have ≤2 escorts). Warning for violations; severe/repeated violations lead to disqualification (no certificate, future entry may be refused).

• Cancellation: Rain or shine; canceled for severe weather (TBD by December 19). No refunds for cancellations or transport/accommodation costs.

• Liability: Insurance covers first aid (hospitalization/outpatient fees TBD). Organizers not liable unless grossly negligent. Participants cover medical expenses post-first aid, third-party damages. Report injuries during event (insurance void otherwise).

• Media: Photos, videos, names, ages, prefectures used in media (e.g., website, news). Organizers own rights; may be used commercially.

• Personal Info: Managed per privacy laws, used for event operations, emergency contact (police, medical). Disputes under Yokohama court jurisdiction.

Ticket Types & Pricing

• Full Marathon: 11,000 yen.

• 30km: 7,700 yen.

• Half Marathon: 7,700 yen.

• 10km: 5,500 yen.

• 5km: 3,300 yen.

• 1 Mile: 3,300 yen.

• Pricing Range: 3,300–11,000 yen + ~500 yen fee.

• Ticket Range: Minimum 1 ticket per participant; maximum 1,200 entries (first-come, first-served).

• Note: Fee includes bib, timing chip, record certificate, insurance, medal (assumed). No event changes post-entry.

Sales Schedule

• Registration: July 16, 2025–December 16, 2025. Closes at 1,200 entries. Contact [email protected] for vacancies.

• Participation Notice: Emailed ~December 17, 2025. Contact secretariat if not received.

• Same-Day Registration: Not available (reception on event day).

Program

• THE CHALLENGE RACE YOKOHAMA 4 in 2025:

  • Events: Full Marathon (42.195km), 30km, Half Marathon (21.0975km), 10km, 5km, 1 Mile.

  • Format: JAAF-certified competitive race with timing chips, pacers (Full Marathon, 30km, Half Marathon). Line-up by pace (9:25 AM). Follow JAAF rules, traffic laws. Record certificates issued (paper or emailed).

  • Features:

    • Hydration/Gels: Water, Amino Vital GOLD (three stations per lap), Amino Shot Perfect Energy (one station).

    • Course Highlights: Flat Tsurumi River loop (<3m elevation), ideal for PBs. Mt. Fuji views on clear days ().

    • Prizes: Bib, timing chip, record certificate, completion medal (assumed).

    • Services: Pacers, staff, guides, first aid, changing rooms, restrooms, luggage storage (no valuables), coin parking, insurance.

    • Atmosphere: “Fast, flat, and fun with awesome support!” – X user.

Performers

• Organizer: RDC RUN CLUB, THE CHALLENGE RACE Executive Committee.

• Supervisor: Yokohama City Athletics Association.

• Pacers: 13 groups (Full Marathon, 30km, Half Marathon; equivalent to Full Marathon paces).

• Volunteers: Contact [email protected] for opportunities.

Venue Details

• Venue: Tsurumi River Right Bank Riverside Circular Course, registration at Gazebo, Shin-Yokohama 3-chome Park (3-22-10 Shin-Yokohama, Kohoku-ku, Yokohama 222-0033).

• Date: December 20, 2025.

• Capacity: 1,200 (300 Full Marathon, 200 30km, 300 Half Marathon, 200 10km, 200 5km, 300 1 Mile).

• Access:

  • Train: JR Yokohama Line/Shinkansen, Shin-Yokohama Station (10-minute walk). From Tokyo Station: ~25 minutes via Shinkansen (~3,000 yen) or ~40 minutes via JR (~600 yen). From Yokohama Station: ~10 minutes (~200 yen).

  • Car: ~15 minutes from Daisan Keihin Road Shin-Yokohama IC (~5km). Coin parking near venue (crowded, ~1,000 yen/day; check locations independently).

• Accommodation: Nearby options: Shin-Yokohama Prince Hotel, Hotel Associa Shin-Yokohama. Contact Jasumo for bilingual booking support.

• Attractions: Nissan Stadium (~5-minute walk), Shin-Yokohama Ramen Museum (~10 minutes), Yokohama Arena (~10 minutes).

Booking with Jasumo

• How: Contact Jasumo Tickets (https://jasumotickets.com/contact). Submit email, event, target time, personal best, emergency contact (name, phone).

• Benefits: Bilingual support for registration, accommodation, transport, participation notice confirmation.

• Note: Registration closes December 16, 2025. Notice emailed ~December 17, 2025. Contact [email protected] for vacancies.

Inquiries

• General: RDC RUN CLUB, THE CHALLENGE RACE Executive Committee ([email protected]).

• Online: https://yokohama-run.rdc-run.com.

Disclaimer

Jasumo offers a facilitation service for participants, including foreign tourists and non-Japanese residents, to access THE CHALLENGE RACE YOKOHAMA 4 in 2025. We are not a ticket reseller and do not sell tickets directly. Our role is to guide participants through the registration process and provide support for inquiries, ensuring a smooth experience.

We address challenges such as:

• Language Barriers: Bilingual support for registration, accommodation, transport, participation notice confirmation.

• Logistics: Assistance with parking, public transport, health declaration, timing chip rules.

• Confirmation: Participation notice emailed ~December 17, 2025 (contact secretariat if not received).

Event Information: Check https://yokohama-run.rdc-run.com for updates. No refunds for cancellations (personal, severe weather) or transport/accommodation costs. Contact Jasumo Tickets (https://jasumotickets.com/contact) or secretariat ([email protected]) for support.

Reviews

• “Flat course and pacers helped me crush my marathon PB!” – 2024 runner

• “Gels and hydration stations were top-notch!” – X user

• “Jasumo’s support made registration a breeze.” – International participant

• “Mt. Fuji view was a bonus on this fast course!” – 2024 runner ()