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Cheltenham 2026

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Cheltenham 2026

QL

Diophantus (JPN)

6yo b h 2020

Track Horse HorseTracker

HorseTracker

Track Horse HorseTracker

HorseTracker

Diophantus (JPN)

b h 2020

Sire

Dam

Diogene (JPN)

Dam's Sire

Deep Impact (JPN)

Owner

Kensuke Tani

Trainer

Breeder

Northern Farm

Last Win

Himeji Tue, 27th Feb, 24 15/8, Tomohiro Yoshimura Norio Tanaka (834 days)

Last Run

Mizusawa Sun, 7th Jun, 26 3rd, 2/1Fav, Yuri Takahashi (3 days)

Lifetime

Runs

Wins

Places

Win %

Earnings

Level Stk

Flat JPN

49

1

10

2%

¥7,190,323.5

-46.12

Under Rules Total

49

1

10

2%

-46.12

Form Figures

48-23460059-222147309788-843478097557784050507-045323

Form Timeline

Form Figures - 48-23460059-222147309788-843478097557784050507-045323

Date Course Conditions

Race Result

Jockey

Class n

MorningSP

07Jun26 Miz 6f Standard 4y+ F(753K)

8-11[2/1Fav]bf3rd of 9, 2.25L behind Power Move

31May26 Miz 6f Standard 4y+ F(753K)

8-11[13/8Fav]bf2nd of 9, 5L behind Kiran

17May26 Mor 6f Standard 4y+ F(753K)

8-11[9/1]3rd of 9, 3.00L behind Yamanin L'alliance

04May26 Mor 6f 4y+ F(753K)

8-11[11/1]5th of 11, 7.25L behind Venire

27Apr26 Miz 6f Standard 4y+ F(753K)

8-11[12/1]4th of 11, 8.50L behind Kirk Smile

08Mar26 Miz 6f 4y+ F(700K)

8-11[40/1]10th of 10, 50.31L behind Masano Vision

29Dec25 Miz 6f 3y+ F(700K)

8-11[40/1]7th of 11, 9.13L behind Be Magical

22Dec25 Miz 6f 3y+ F(700K)

8-11[25/1]10th of 11, 7.94L behind Wreath And Ribbon

15Dec25 Miz 7f 3y+ F(700K)

8-11[66/1]5th of 10, 4.75L behind Grevillea

09Dec25 Miz 6f Slow 3y+ F(700K)

8-11[66/1]10th of 10, 8.03L behind Blaaveis

01Dec25 Miz 7f 3y+ F(700K)

8-11[100/1]5th of 9, 11.63L behind Arble Rable

25Nov25 Miz 6f 3y+ F(700K)

8-11[80/1]10th of 11, 11.25L behind Aztlan

17Nov25 Mor 7f Standard 3y+ F(700K)

8-11[80/1]4th of 9, 6.50L behind Fireworks

11Nov25 Mor 6f 3y+ F(700K)

8-11[14/1]8th of 12, 13.31L behind Citrusdal

Change of Trainer Kazumune Ito to Hiroji Chiba

20Oct25 Mor 7f 3y+ F(700K)

8-11[50/1]7th of 10, 9.81L behind G T Pearl

06Oct25 Miz 7f 3y+ F(700K)

8-11[25/1]7th of 11, 8.26L behind Vip Ariel

Ryoto Tsukamoto

30Sep25 Miz 7f 3y+ F(700K)

8-11[40/1]5th of 12, 6.75L behind Himalaya Veloz

14Sep25 Miz 6f 4y+ F(700K)

8-11[25/1]5th of 10, 9.25L behind Suzuka Panther

01Sep25 Mor 8f Standard 4y+ F(1050K)

8-11[66/1]7th of 11, 4.03L behind Solo Phrase

17Aug25 Mor 8f Standard 4y+ F(1050K)

8-11[28/1]9th of 10, 9.75L behind Alvia

04Aug25 Mor 8f Standard 4y+ F(1050K)

8-11[22/1]10th of 12, 4.01L behind A Shin Policy

20Jul25 Mor 8f Standard 3y+ F(1050K)

8-11[12/1]8th of 8, 9.50L behind Yamanin Baltoro

Change of Trainer Norio Tanaka to Kazumune Ito

12Mar25 Son 7f 4y+ F(1008K)

8-11[7/2]7th of 12, 11.63L behind L Halcon

25Feb25 Him 7f Standard 4y+ F(1008K)

8-11[8/1]4th of 9, 6.00L behind Wonder Bless

13Feb25 Him 7f Standard 4y+ F(1008K)

8-11[5/1]3rd of 12, 6.00L behind Guarania

22Jan25 Him 7f Standard 4y+ F(1260K)

8-5[5/1]4th of 10, 2.03L behind Piroko Giga Max

Takahashi Manato

02Jan25 Son 7f Standard 4y+ F(1260K)

8-11[100/1]8th of 12, 0 behind Do Anything

19Dec24 Son 7f Standard 3y+ F(1260K)

8-11[80/1]8th of 10, 0 behind Dawn Chorus

27Nov24 Son 7f 3y+ F(1260K)

8-11[25/1]8th of 10, 6.12L behind Flora Sunrise

05Nov24 Son 7f 3y+ F(1260K)

8-11[18/1]7th of 10, 17.00L behind Belfast

14Jun24 Son 8f Standard 2y F(1980K)

8-11[50/1]9th of 12, 9.88L behind Obotchama

24May24 Son 7f Standard 4y F(1799K)

8-9[9/1]10th of 12, 11.88L behind Starkey

Yamamotoya Taizo

02May24 Son 7f F(1799K)

8-11[11/4]3rd of 12, 3.06L behind Epic Day

11Apr24 Son 7f Heavy F(1799K)

8-11[40/1]7th of 12, 9.25L behind Vlag

Yoshiki Kamomiya

26Mar24 Son 7f F(1899K)

8-9[11/2]4th of 9, 3.00L behind Realize

Yamamotoya Taizo

27Feb24 Him 7f F(1330K)

8-11[15/8]1st of 10, 0.75L to Happy Yellow

Tomohiro Yoshimura

07Feb24 Him 7f F(1520K)

8-11[11/8]2nd of 5, 5L behind La Vie En

Tomohiro Yoshimura

16Jan24 Him 9f Fast F(1520K)

8-11[7/4]2nd of 12, 1L behind Puff Of Wind

Tomohiro Yoshimura

02Jan24 Son 7f Fast F(1329K)

8-11[5/1]2nd of 12, 5L behind Hustler

Change of Trainer Takashi Saito to Norio Tanaka

04Nov23 Fuk 9f 3y F(15200K)

8-5[5/1]9th of 14, 8.56L behind New Normal

Manami Nagashima

01Oct23 Han 10f 3y F(15200K)

8-9[28/1]5th of 12, 2.81L behind Mozu Rock 'n' Roll

13Aug23 Kok 6f 3y F(10480K)

8-11[14/1]13th of 18, 0 behind Juhannus

24Jun23 Han 9f 3y F(10480K)

8-11[9/4Fav]bf14th of 16, 0 behind Ahead

16Apr23 Han 8f 3y F(10480K)

8-11[11/2]6th of 18, 7.50L behind Elton Barows

Yuichi Kitamura

01Apr23 Han 9f 3y F(10480K)

8-11[11/2]4th of 18, 1.56L behind Itokawa Sakura

Yuichi Kitamura

04Feb23 Kok 10f 3y F(10480K)

8-11[10/11Fav]bf3rd of 9, 2.50L behind Sasuke

Bauyrzhan Murzabayev

14Jan23 Kok 10f 3y F(10480K)

8-11[7/2JFav]bf2nd of 13, Dht behind Ailes Minerva

Bauyrzhan Murzabayev

01Oct22 Chu 10f 2y F(9899K)

8-9[11/4]8th of 10, 9.56L behind Vip Chloe

Kohei Matsuyama

24Jul22 Kok 9f 2y F(13400K)

8-7[7/4Fav]bf4th of 10, 0 behind Red Solid

Yuichi Kitamura

Symbols Explained

ts² Tongue Strap vs² Visor hd² Hood es² Eye Shield ec² Eye Cover cp² Cheekpiece bl² Blinkers tt² Tongue Tie bf Beaten Favourite on Last Run srMentioned in Stewards Report in Results bbvBroke Blood Vessel

The superscript number on headgear bl² indicates number of times worn. A plus bl⁺ indicates more than 10 times where as red background bl¹indicates first time.

Date Course

Conditions

Race

Jockey Weight

OR Class

Date

Sale

Consignor

Purchaser

Price

Reports in which Diophantus (JPN) was mentioned

Related by Dam Diogene (JPN)

Runner

Wins-

Runs

%Wins

Sire

Duke Axe (JPN) b m 2018

4-

10

40

Majestic Warrior (USA)

Reboost (JPN) b m 2019

0-

1

0

Harbinger (UNR)

Sail Free (JPN) b m 2022

1-

7

14