Australian Wagyu Forum

New ! Ginjo 2018 AI Sire List

Pricing and Availability

Australia: All sires are available for Australian domestic use at unit prices $AUD45 – $AUD65 unit, depending on volume. Contact us for details.

International:  Selected sires have also been collected for USA, RSA, NZ and other markets. Availability and pricing on application.


The 2018 Ginjo catalogue offers ‘licensed’* semen from six Japanese Black fullblood sires. All suitable for Australian domestic market use, some also compliant for USA, RSA, NZ and other international markets. The sires selected are complementary with each other, to be used in any rotation that clients may design to balance established pedigrees/genetics in their herds.

Although some sires are proven in F1, this ‘bull battery’ is selected for high performance, ‘higher content’ production – F2 through fullblood, where quality means more than marbling.   Selection is on individual bull calf performance, which the averaging of AWA BREEDPLAN tends to somewhat obscure, so raw data samples are included with BREEDPLAN summaries.

All current Ginjo AI sires were bred for our own fullblood feeder operation, where we had found ourselves unable to source AI sires that could simultaneously enhance feeder profitability (especially in terms of 200-400 day growth), breeder performance and genetic diversity. A key selection principle was the identification and procurement of rare (outside Japan) Tottori/Kedaka genetics, which form the backbone of Japanese FB production since the 1960s.

We offer a greater range of this Tottori/Kedaka infusion than any other international Japanese Black genetics vendor.

*Australian domestic ‘licensed’ semen means unregulated collection at an Australian accredited collection centre to general licensed standards, which are mandated with numerous variations in conditions for individual export markets.

Breeding Targets

The overall Ginjo target is summarised as a sharp focus on breeding to Japanese performance standards – strong early growth balanced with excellent carcass marbling and heavy carcass weights, significant genetic diversity and quiet temperament.

All Ginjo licensed semen-collected sires must be tested free of the hereditary recessive genetic conditions now widely identified in the Australian Wagyu population.

These are important targets for herds moving up to produce F2 and higher infusion Japanese Black commercial cattle, as well as fullblood operations. Many breeders moving up from F1 are joining females with relatively high Tajima content, with reduced growth and maternal capabilities. Subsequent high Tajima sire selection is often counterproductive in this environment.

Genetic Benchmarks with Leading Japanese Sires

Black Wagyu breeders who are knowledgeable about their breed are aware that the Japanese Black herd – both at home and internationally – is divided by ancestral sub-genomes developed in individual Japanese prefectures.   These genetically separate groups are still identifiable today and remain an important part of Japanese sire and breeder selection. (See analysis of the 2016-2017 Leading Sires of Japan on this site here.)

To achieve future Ginjo production targets, we identified rare heritage genetics within the international herd, and co-opted these genetics.. We continue herd development from these resources. An analysis of the current Ginjo AI sire range in prefectural analysis is below, while the pie chart accompanying this (by international expert Tak Suzuki) enables comparison with the current Top 10 Japanese Sires (by JMGA-measured Carcass Performance). Note that the pie chart descriptor ‘Fujiyoshi/Shimane’ is effectively the ‘Itozakura’ of the table.

As illustrated, the current sub-genome analysis of the Ginjo AI sire group is a near perfect match for a identical analysis of the Top 10 2016-2017 Japanese Sires ranked by JMGA grading system carcass performance of progeny.

Genetic Analysis: Ginjo 2018 AI Sires

Ginjo Sires B901 K921 K930 J828 L965 L9 Av. %%
Hyogo/Tajima 44 17 44 50 40 47 40.3
Tottori/Kedaka 25 74 32 25 25 40 36.8
Itozakura 19 5 18 25 25 9 16.8
Other (trace) 12 4 6 10 4 6

Japanese Sire Ranking 2016/2017: Top 10
JMGA Grading% By Genetic Content

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