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Climbing gym · Inzai, Japan

ROCKY Climbing & Fitness Gym Inzai grades, explained

ロッキー 印西店

ROCKY Inzai is on the 2nd floor of the BIG HOP mall in Inzai, Chiba, 3 minutes from Inzai-Makinohara Station. At 320 tsubo (about 1,060 m²) it is the largest of the six ROCKY gyms, and visitors use the mall's car parks (lots A or B-1 are closest).

Gym websiteDirectionsDay pass ¥2,000 · hours and prices below

Bouldering grades

Problems are marked with coloured tape, one colour per Japanese kyu/dan grade, from yellow (10–9級) to black (3段 and up). The colour key below is from a climber's 2017 blog; the gym does not publish it online. Font equivalents use the kyu/Font table on Japanese Wikipedia, not the gym's own conversion.

LevelFont≈ V-scale
黄 Yellow (9〜10級)Below the conversion table (8級 = 1+–2); hands and feet free1–1+VB−
ピンク Pink (8級)Feet free. V: VB-1+–2VB−–VB
茶 Brown (7級)Feet restricted to taped holds from here. V: VB to VB+2+–3VB–VB+
白 White (6級)V: V0- to V03+–4VB+–V0+
赤 Red (5級)V: V0+ to V14+–5V0–V3
オレンジ Orange (4級)V: V2 (V3 falls between 4級 and 3級)5+–6AV2–V3
紫 Purple (3級)V: about V3 to V46A+–6BV3–V4
緑 Green (2級)V: about V4 to V56B+–6CV4–V5
若草 Yellow-green (1級)V: V6 (V5 falls between 2級 and 1級)6C+–7AV5–V6
紺 Navy (初段)V: V77A+–7BV7–V8
水 Light blue (二段)V: V9 (V8 falls between 初段 and 二段)7B+–7CV8–V9
黒 Black (三段〜)Open-ended. V: V10 to V11≥ 7C+≥ V10

ROCKY Climbing & Fitness Gym's gyms appear to share this grading, though ROCKY Climbing & Fitness Gym doesn't say so outright. All ROCKY Climbing & Fitness Gym gyms and grades

From climbers' descriptions and photos of the gym's grade boards. Gyms reset and regrade often, and grades vary between setters, so treat this as a guide and check the boards when you visit.

Visiting ROCKY Climbing & Fitness Gym Inzai

Address
BIG HOP Mall Bldg 2F, 1-2 Hara, Inzai, Chiba 270-1335〒270-1335 千葉県印西市原1-2 BIGHOPモール棟2FGoogle MapsApple MapsOpenStreetMap
Booking
Walk in: no booking neededOfficial: no booking needed; tell the desk it is your first time.
Prices
Day pass · adultWeekday¥2,000
Day pass · adultweekends and holidays¥2,200
Day pass · studentWeekday; university, vocational, high school and junior high students¥1,500
Day pass · studentweekends and holidays¥1,700
Day pass · childElementary school and under, weekday (weekends 1,400)¥1,200
Monthly · adultMembership paid monthly by card or direct debit, this store only (all stores 11,900; students 7,900)¥9,900
Monthly · adultOne-month pass, this store only (all stores 16,500)¥14,300
Shoe hireFree on the first rental; chalk 200¥300
Tax included. First-time registration fee 1,100 (valid for all stores; 500 yearly renewal). Prepaid card: pay 20,000 for 22,000 of credit.All prices on the gym's site
Opening hours
Mon–Fri10:00–23:00
Sat–Sun10:00–21:00
Public holidays10:00–21:00
Set days, shortened hours and closures are posted on the business calendar (rockyclimbing.com/set/).Hours on the gym's site
First visit
What to know before your first visit
Phone
+81 47-636-7758
Photos
InstagramPhotos on Google Maps

Hours and prices from the gym's own website, checked 3 October 2026. They change, so check before you go.

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Questions

What Font grade is 黄 Yellow (9〜10級) at ROCKY Climbing & Fitness Gym Inzai?
黄 Yellow (9〜10級) at ROCKY Climbing & Fitness Gym Inzai is 1–1+, about VB− in V-scale.
What Font grade is ピンク Pink (8級) at ROCKY Climbing & Fitness Gym Inzai?
ピンク Pink (8級) at ROCKY Climbing & Fitness Gym Inzai is 1+–2, about VB−–VB in V-scale.
What Font grade is 茶 Brown (7級) at ROCKY Climbing & Fitness Gym Inzai?
茶 Brown (7級) at ROCKY Climbing & Fitness Gym Inzai is 2+–3, about VB–VB+ in V-scale.
What Font grade is 白 White (6級) at ROCKY Climbing & Fitness Gym Inzai?
白 White (6級) at ROCKY Climbing & Fitness Gym Inzai is 3+–4, about VB+–V0+ in V-scale.
What Font grade is 赤 Red (5級) at ROCKY Climbing & Fitness Gym Inzai?
赤 Red (5級) at ROCKY Climbing & Fitness Gym Inzai is 4+–5, about V0–V3 in V-scale.
What Font grade is オレンジ Orange (4級) at ROCKY Climbing & Fitness Gym Inzai?
オレンジ Orange (4級) at ROCKY Climbing & Fitness Gym Inzai is 5+–6A, about V2–V3 in V-scale.
Convert any gradeAll gyms

Other ROCKY Climbing & Fitness Gym gyms

More gyms in Japan

Sources

  1. ROCKY: Inzai branch page (address, phone, hours, parking, 320 tsubo)
  2. ROCKY: price list
  3. mirei3のblog (2017-05-16): visit to Shinagawa ROCKY with the tape colour grade chart (in Japanese)
  4. Japanese Wikipedia: ボルダリング, kyu/dan vs Font/V table (source: Dai Koyamada, 2009)
  5. ROCKY: home page (six gyms in the Tokyo area)

Checked 3 October 2026. Gear Loop isn't affiliated with ROCKY Climbing & Fitness Gym Inzai.