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Foundation animalMixedFullblood Black

Dai 6 Seizan

bull

Mixed · exported 1998

Dai 6 Seizan, tagged '006' and sometimes called simply 'the 6th Westholme bull,' is the second of the three black sires whose semen Westholme imported from ET Japan (Hokkaido) in 1998 with a consignment of 59 females. Genetically he is one of the more interesting composites among the foundation sires: an Itozakura/Tajima cross that layers Tottori/Kedaka growth and maternal ability, Itozakura (with roots in Okayama and Fujiyoshi) for frame and size, and Kikunori Doi marbling introduced through the bull Kanehagi. That blend made him a valuable tool for breeders wanting to add growth and body volume without abandoning marbling potential, complementing the pure-Tajima marbling of '003' Kitateruyasudoi and the Kedaka growth of '005' Shigefuku within the same import group. Like the other Westholme semen sires he never physically left Japan as a live animal and travelled via Australia, which is why he is routinely absent from live-import foundation rosters despite being a genuine exported foundation sire.

Registry record

Born🇯🇵 Japan — only his semen was exported; the bull never left Japan
BloodlineAn Itozakura/Tajima cross carrying Tottori/Kedaka growth and maternal traits plus Itozakura (Okayama/Fujiyoshi) size, with Kikunori Doi marbling introduced through Kanehagi. A deliberately composite growth-plus-marbling sire.
BreedFullblood Black
ImporterWestholme (semen)
Semen imported1998 · Westholme (semen) — bull never left Japan
Carcass / marblingBalances size and marbling: growth and maternal strength from the Tottori/Kedaka side, frame/size from Itozakura, and enhanced marbling contributed through Kikunori Doi via the bull Kanehagi. Positioned as a growth-with-quality composite rather than a pure marbling bull.

Bloodline analysis

Tajima — 25%Itozakura — 19%Shimane — 6%Okayama — 50%50%OKAYAMA
Tajima4/1625%
Itozakura3/1619%
Shimane1/166%
Okayama8/1650%

Group C · 16/16 strain analysis · 16/16 Analysis chart (Wagyu International)

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