Key Figures · Racer

Taiji Yamamoto

Placed first in Pro Freestyle at the Jet Ski World Cup in 2019, 2022 and 2025 on the organiser's held result sheets, riding for Japan.

1. The early years, in print, 1981 to 1993
2. The makers and their machines, 1985 to 2005
3. Noise, safety and federal rules, 1996 to 2002
4. The rule book years, 2002 to 2018 (this page's records)
5. Three rule books, 2021 to 2026 (this page's records)

1990200020102020

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Titles on the record (3)

Each read off a results document the archive holds: a result sheet, or, for a season's title, the body's own champions grid or season table, with the name as that document prints it.

Results

2019, 2022 and 2025 · Confirmed

The 2019 sheet gives Yamamoto 37 points over two runs, two ahead of Lee Stone; the 2022 sheet gives 40 points over two runs; the 2025 sheet gives Yamamoto 37 points, the same as the second-placed rider, and places Yamamoto first.

Sources: World Cup 2019 Pro Freestyle sheet; WGP#1 World Cup 2022 Pro Freestyle sheet; WGP#1 World Cup 2025 Pro Freestyle sheet

2015 and 2018 · Confirmed

At the King's Cup - Thai Airways International Jet Ski World Cup 2015 Yamamoto placed third in Pro Freestyle on a Yamaha, and at the 2018 World Cup second, again on a Yamaha.

Sources: World Cup 2015 Pro Freestyle sheet; World Cup 2018 Pro Freestyle sheet

2016 and 2017 · Likely

The organiser's podium page for 2016 and its news of 6 December 2016 name Yamamoto the Pro Freestyle champion of that year's World Cup, and its podium page for 2017 gives third place. No result sheet for 2016 or 2017 is held, and both pages come from the same organiser.

Sources: World Cup podium 2016; World Cup 2016 Pro champions news; World Cup podium 2017

2017 · Likely

At the 2017 Blowsion World Finals Yamamoto placed eleventh in Pro Freestyle on a Kawasaki, listed under Japan. The tie between this row and the World Cup rider is the same class, year and country, an inference, since the organiser's 2017 podium page prints Pro Freestyle and JP beside the name.

Sources: 2017 World Finals Sunday results; World Cup podium 2017

2015 · Likely

The revised results of the 2015 World Finals list a Taiji Yamamoto eleventh in Pro Freestyle on a Kawasaki. The sheet prints no country on that row, so reading it as the same rider rests on the name and on the Pro Freestyle result at the World Cup that December.

Sources: 2015 World Finals results

Elsewhere in the archive

• History chapter: Freestyle as a discipline in the rule books
• Event: WGP#1 World Grand Prix and World Series
• Event: IJSBA World Finals
• Organisation: WGP#1 Waterjet World Grand Prix
• Organisation: International Jet Sports Boating Association
• Era: The rule book years
• Era: Three rule books, 2021 to 2026

What the archive has not read (3)

• The archive's own research notes, written from web searches, say Yamamoto won Pro Freestyle at the 2024 IJSBA World Finals. The archive holds no 2024 World Finals result (searched the archive's mirror and research cache, 2026-10-05), so it is not listed.
• The World Cup's hall of fame lists Yamamoto as Pro Freestyle winner for 2016, 2019 and 2021 to 2025. The 2021 and 2024 result sheets have not been read, and the 2023 standings were seen only in a copy saved during research, which is not a held text; none of those years is a title here (checked 2026-10-05).
• The 2016 World Cup result pages return not found on the live site and in the Wayback Machine, so the 2016 result rests on the organiser's summaries (checked 2026-10-05).

Documents cited on this page

• World Cup 2019 Pro Freestyle sheet (jetski-worldcup.com): Thai Airways International Jet Ski World Cup 2019, Pro Freestyle, result sheet (image, transcribed), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldcup.com), 2019-12-08; sanctioning body, high. The organiser's signed result sheet for Pro Freestyle at the event of 5 to 8 December 2019, printed 8 December 2019. An image on the live site; the held text is a transcription made by reading it.
• WGP#1 World Cup 2022 Pro Freestyle sheet (jetski-worldcup.com): WGP#1 Waterjet World Cup and WGP#1 Waterjet World Series 2022, Pro Freestyle, result sheet (image, transcribed), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldcup.com), 2022-12-21; sanctioning body, high. The organiser's signed result sheet for Pro Freestyle, page 5 of the 2022 results, printed 21 December 2022 and shown on the organiser's results news of 22 December 2022. (as World Cup 2019 Pro Freestyle sheet above)
• WGP#1 World Cup 2025 Pro Freestyle sheet (jetski-worldseries.com): WGP#1 Waterjet World Cup, World Series and Asian Championships 2025, Pro Freestyle, result sheet (image, transcribed), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldseries.com), 2025-12-20; sanctioning body, high. The organiser's result sheet for Pro Freestyle at the event of 17 to 21 December 2025 at Pattaya, printed 20 December 2025, from the World Series site's round 3 results. An image; the held text is a transcription made by reading it. The sheet prints EVENT CLOSED COURSE on a freestyle class.
• World Cup 2015 Pro Freestyle sheet (jetski-worldcup.com): King's Cup - Thai Airways International Jet Ski World Cup 2015, Pro Freestyle, result sheet (image, transcribed), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldcup.com), 2015-12-06; sanctioning body, high. The organiser's result sheet for Pro Freestyle at the event of 2 to 6 December 2015, after the second run, with run totals, points and final positions. (as World Cup 2019 Pro Freestyle sheet above)
• World Cup 2018 Pro Freestyle sheet (jetski-worldcup.com): Thai Airways International Jet Ski World Cup 2018, Pro Freestyle, result sheet (image, transcribed), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldcup.com), 2018-12-09; sanctioning body, high. The organiser's signed result sheet for Pro Freestyle at the event of 6 to 9 December 2018, printed 9 December 2018, with run totals, points and final positions. An image on the live site (the archive has the page but not the image); the held text is a transcription made by reading it.
• World Cup podium 2016 (web.archive.org): King's Cup - Jet Ski World Cup 2016, OWN THE PODIUM 2016 (history-en.html, Wayback capture), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldcup.com); sanctioning body, medium. The organiser's top five in each class of the 2016 event, captured in April 2019. The 2016 result sheets are not held (the result pages return 404 on the live site and in the archive), so this page and the organiser's champions news are the 2016 record.
• World Cup 2016 Pro champions news (web.archive.org): King's Cup - Jet Ski World Cup 2016, Impressive photos of the 5 Pro Champions (news of 6 December 2016, Wayback capture), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldcup.com), 2016-12-06; sanctioning body, medium. The organiser's news post naming the champion of each of the five Pro classes of 2016 with number, country and team. Contemporary, from the same publisher as the 2016 podium page, so not independent of it.
• World Cup podium 2017 (web.archive.org): Jet Ski World Cup 2017, OWN THE PODIUM 2017 (history-en-.html, Wayback capture), Jet Ski World Cup Grand Prix Co., Ltd (jetski-worldcup.com); sanctioning body, medium. The organiser's top five in each class of the 2017 event, captured in December 2023. The word Champion is printed with every row; the place label before each row is the placing. No 2017 result sheet is held.
• 2017 World Finals Sunday results (ijsba.com): 2017 Blowsion World Finals Results, Sunday 8 October (IJSBA page), International Jet Sports Boating Association, 2017-10-08; sanctioning body, high. The association's posted results for the Sunday of the 2017 World Finals, including the pro classes, read on 22 September 2026.
• 2015 World Finals results (web.archive.org): Quakeysense World Finals 2015, revised final results (PDF, Wayback capture), International Jet Sports Boating Association, 2015-10-19; sanctioning body, high. Revised final results by race, with make per rider, for the World Finals of October 2015. The 2013/07 in the address is an upload folder, not the year.

Cite this page

“Taiji Yamamoto”, BaddJet archive, https://baddjetarchive.com/key-figures/taiji-yamamoto/

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