TopBJJ Index Youth

TopBJJ Index

Search TopBJJ Index
Language selector
Menu
JP

Fuga Sakai

Gracie Barra Sternschanze

W–L
3–5
Won and lost rating-eligible matches in the past 12 months.
Gi
1,097
Rating based on Gi matches in the past 12 months.
No-Gi
1,348
Rating based on No-Gi matches in the past 12 months.
Current form
3–5
Results from the ten most recent rating-eligible matches.
Opponents
4
Unique opponents faced in rating-eligible matches in the past 12 months.

Scheduled

  1. 2026 AGF Bremen Open

    Germany

    Gi Kids / Boys / Juniors (12 - 13 yrs) / Orange / Light III (Up to 52.20 kg) Gi Kids Challenger / Boys / Regular Challenger / Light III (Up to 52.20 kg)
    Confirmed

Tournament history

Events

8
Events
Date Event Result Format Division
Grappling Industries HAMBURG Germany · Gi · 14–15 yo · yellow/orange · ≤115 lb ; No-Gi · 14–15 yo · yellow/orange · ≤115 lb 2–2 W–L: Win / Loss GiNo-Gi
  • Gi Kids / 14 - 15 years (Male) / Yellow/Orange / -115 lbs
  • No Gi Kids / 14 - 15 years (Male) / Advanced (Yellow/Orange) / -115 lbs
The Combatch Games 5: Kids & Teens - Berlin Germany · Gi · 13 yo · orange/green · ≤50 kg ; No-Gi · 13 yo · ≤55 kg 1–3 W–L: Win / Loss GiNo-Gi
  • Teen Boys Nogi / Fortgeschrittene / Teen 1 (12/13yrs) / - 55 kg
  • Teen Boys Gi / Orange & Green / Teen 1 (12/13yrs) / - 50 kg
King Tatami - BJJ Gi Kids Pro Germany · Gi · 12–13 yo · ≤55 kg 2–0 W–L: Win / Loss Gi
  • Boys Gi / 12-13 Jahre/Years / -55 kg
ILLCS Germany IX Spring 2025 Germany · Gi · 10–13 yo · ≤46 kg ; Gi · 10–13 yo 5–1 W–L: Win / Loss Gi
  • Kids 10-13 Open Class
  • Kids 10-13 / 46 kg
Nijmegen Open BJJ 2024 the Netherlands · Gi · 10–12 yo · yellow/orange · ≤38/42 kg 2–2 W–L: Win / Loss Gi
  • Kids / 10 - 12 years boys / Yellow & Orange / -38 &-42 kg
Lion Cub Jiu Jitsu Competition 2 the Netherlands · Gi · yellow/orange · ≤38/42 kg 3–1 W–L: Win / Loss Gi
  • Boys / 10 - 12 Boys / Yellow & Orange / -38 & -42 kg
Fennec BJJ Kids Cup Vol. 4 Germany · Gi · 10 yo · white/grey · ≤39 kg 1–2 W–L: Win / Loss Gi
  • Boys Gi / Junior I (9/10yrs) / White/Grey (bzw. bis 1 Jahr Training) / -39,00 kg
Nijmegen Open BJJ 2023 the Netherlands · Gi · 8–9 yo · yellow · ≤34/38 kg 2–2 W–L: Win / Loss Gi
  • Kids / 8 - 9 years boys / Yellow / -34 & -38 kg

Calculation details

Rating breakdown for the past 12 months

See the published month-end rating and the rating-eligible matches added in each month. Open a month for details.

August 2026 4 new matches Change +66 Rating 1,322

Rating-period composition

Rating matches
8 +4
Record
3–5 Previous month 1–3
Opponents
4 +2
Events
2 +1

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Loss
August 15, 2026 Soma Sakai
Grappling Industries HAMBURG Gi Kids / 14 - 15 years (Male) / Yellow/Orange / -115 lbs
Method Points 04:00 2–9
Marginal influence -19
Loss
August 15, 2026 Soma Sakai
Grappling Industries HAMBURG Gi Kids / 14 - 15 years (Male) / Yellow/Orange / -115 lbs
Method Submission 02:36 4–5
Marginal influence -19
Win
August 15, 2026 David Chkhaidze
Grappling Industries HAMBURG No Gi Kids / 14 - 15 years (Male) / Advanced (Yellow/Orange) / -115 lbs
Method Points 04:00 2–0
Marginal influence +29
Win
August 15, 2026 Soma Sakai
Grappling Industries HAMBURG No Gi Kids / 14 - 15 years (Male) / Advanced (Yellow/Orange) / -115 lbs
Method Submission 00:31 6–0
Marginal influence +43
July 2026 No new matches Change 0 Rating 1,256

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

June 2026 No new matches Change -4 Rating 1,256

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

May 2026 No new matches Change +1 Rating 1,260

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

April 2026 No new matches Change -1 Rating 1,259

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

March 2026 No new matches Change +6 Rating 1,260

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

February 2026 No new matches Change 0 Rating 1,254

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

January 2026 4 new matches Change Starting point Rating 1,254

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Win
January 31, 2026 Lenny Arend
The Combatch Games 5: Kids & Teens - Berlin Teen Boys Nogi / Fortgeschrittene / Teen 1 (12/13yrs) / - 55 kg
Method Disqualification 00:53 0–0
Marginal influence +38
Loss
January 31, 2026 Unknown User
The Combatch Games 5: Kids & Teens - Berlin Teen Boys Nogi / Fortgeschrittene / Teen 1 (12/13yrs) / - 55 kg
Method Points 04:00 0–3
Marginal influence -13
Loss
January 31, 2026 Lenny Arend
The Combatch Games 5: Kids & Teens - Berlin Teen Boys Gi / Orange & Green / Teen 1 (12/13yrs) / - 50 kg
Method Points 04:00 0–0
Marginal influence -26
Loss
January 31, 2026 Lenny Arend
The Combatch Games 5: Kids & Teens - Berlin Teen Boys Gi / Orange & Green / Teen 1 (12/13yrs) / - 50 kg
Method Points 04:00 0–5
Marginal influence -26
Relevant matches
5.7
Official ranking percentile
Top 53%
Performance
-

5.7 weighted matches against 4 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,409
Repeated-opponent share
50.0%
Network connectivity
87.6%

Classification evidence

Why U14?

Within the published period from 2025-09-01 through 2026-08-31, only competition ages recorded at events in the calculation year determine this outcome, with at most one vote per event. Without such an age, the most recent unambiguous earlier competition age is projected to the calculation year; bracket evidence is the final fallback. The newest evidence breaks a tie.

Evidence outcome

  • U14 2 event votes Selected outcome

Registrations and outcomes

Grappling Industries HAMBURG
U14 · Counts
No Gi Kids / 14 - 15 years (Male) / Advanced (Yellow/Orange) / -115 lbs
  • Competition age 13
  • Registered age: u16
  • Source category: u16
Gi Kids / 14 - 15 years (Male) / Yellow/Orange / -115 lbs
  • Competition age 13
  • Registered age: u16
  • Source category: u16
The Combatch Games 5: Kids & Teens - Berlin
U14 · Counts
Teen Boys Nogi / Fortgeschrittene / Teen 1 (12/13yrs) / - 55 kg
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Teen Boys Gi / Orange & Green / Teen 1 (12/13yrs) / - 50 kg
  • Competition age 13
  • Registered age: u14
  • Source category: u14
King Tatami - BJJ Gi Kids Pro
Does not count
Boys Gi / 12-13 Jahre/Years / -55 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14

Classification evidence

Why ≤ 52 kg?

This outcome uses at most one unambiguous upper weight limit per completed ranking event from 2025-09-01 through 2026-08-31. Only the three most recent eligible events are considered, and the lightest verified upper limit is selected. A higher division is not treated as measured body weight.

Evidence outcome

  • ≤ 52 kg 1 competition event Selected outcome

Registrations and outcomes

Grappling Industries HAMBURG
≤ 52 kg · Counts as a competition event
No Gi Kids / 14 - 15 years (Male) / Advanced (Yellow/Orange) / -115 lbs
  • Registered weight class: -115 lbs
  • Source competition limit: -115 lbs

2 matches in the rating period

Grappling Industries HAMBURG
≤ 52 kg · Counts as a competition event
Gi Kids / 14 - 15 years (Male) / Yellow/Orange / -115 lbs
  • Registered weight class: -115 lbs
  • Source competition limit: -115 lbs

2 matches in the rating period

The Combatch Games 5: Kids & Teens - Berlin
≤ 55 kg · Does not count
Teen Boys Nogi / Fortgeschrittene / Teen 1 (12/13yrs) / - 55 kg
  • Registered weight class: - 55 kg
  • Source competition limit: - 55 kg

2 matches in the rating period · conflicting upper weight limits make this event ambiguous

The Combatch Games 5: Kids & Teens - Berlin
≤ 50 kg · Does not count
Teen Boys Gi / Orange & Green / Teen 1 (12/13yrs) / - 50 kg
  • Registered weight class: - 50 kg
  • Source competition limit: - 50 kg

2 matches in the rating period · conflicting upper weight limits make this event ambiguous

King Tatami - BJJ Gi Kids Pro
Does not count
Boys Gi / 12-13 Jahre/Years / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

No matches in the rating period · no valid weight evidence

Classification evidence

Why Orange?

This outcome uses the belt category of every rating-eligible match from 2025-09-01 through 2026-08-31. The most-fought category is selected; the newest evidence breaks a tie.

Evidence outcome

  • orange 4 matches in the rating period Selected outcome
  • green 2 matches in the rating period

Registrations and outcomes

Grappling Industries HAMBURG
orange · Counts as a match
Gi Kids / 14 - 15 years (Male) / Yellow/Orange / -115 lbs
  • Source belt category: orange

2 matches in the rating period

Grappling Industries HAMBURG
orange · Counts as a match
No Gi Kids / 14 - 15 years (Male) / Advanced (Yellow/Orange) / -115 lbs
  • Source belt category: orange

2 matches in the rating period

The Combatch Games 5: Kids & Teens - Berlin
green · Counts as a match
Teen Boys Gi / Orange & Green / Teen 1 (12/13yrs) / - 50 kg
  • Source belt category: green

2 matches in the rating period