Black Wagyu bulls standing together on an open range

The Studbook

Our Sires

Three proven fullblood Wagyu sires, held to one standard: carcass performance that pays at the rail. Every straw ships frozen from the ranch, AI-ready.

Black fullblood Wagyu bull grazing in an open pasture

Sire No. 01 · Tajima bloodline · 100% Fullblood Wagyu

Beijirou ET 8896

Tajima bloodlineMarbling depth

The marbling engine. Tajima-influenced genetics for intramuscular fat scores that hold up on the grid, embryo-transfer quality from a proven donor line.

Pedigree & bloodline

Tajima blood — the line behind the famous Kobe-style marbling. The ET prefix marks an embryo-transfer calf from a proven donor cow, chosen for her ability to pass intramuscular fat to her sons.

Registration No.

[Registration No. — from lineage papers]

Sire

[Sire name — from pedigree papers]

Dam

[Dam name — from pedigree papers]

Maternal Grandsire

[Maternal grandsire — from pedigree papers]

The breeding angle

Use Beijirou when the grid is the goal. On moderate-framed commercial cows he puts extreme marbling into calves that still arrive unassisted and hit the ground growing.

Best fit: herds selling on carcass merit or retaining ownership through the feedyard. Pair him with your stoutest maternal cows and let the IMF scores do the talking.

Request a quote for Beijirou ET 8896

Close-up portrait of a black Wagyu bull against a dark background

Sire No. 02 · Kikuyasu lineage · 100% Fullblood Wagyu

JVP Kikuyasu-400

Kikuyasu lineageBalance and maternal strength

The all-rounder. Growth, frame, and maternal traits without giving up marbling — the sire you build a program around, not just a season.

Pedigree & bloodline

The Kikuyasu line traces to some of the most used Wagyu genetics in Japanese breeding programs — cattle selected for balanced traits instead of a single extreme, which is what makes his daughters worth keeping.

Registration No.

[Registration No. — from lineage papers]

Sire

[Sire name — from pedigree papers]

Dam

[Dam name — from pedigree papers]

Maternal Grandsire

[Maternal grandsire — from pedigree papers]

The breeding angle

Use Kikuyasu when you are building a program, not just a season. His daughters hang around — and they keep the marbling gene moving through your herd after the first cross.

Best fit: producers who want one AI sire to cover the whole breeding season — growth for the feeder, grade for the grid, and maternal value underneath it all.

Request a quote for JVP Kikuyasu-400

Black Wagyu cattle on mountain rangeland in golden light

Sire No. 03 · Marblemax program · 100% Fullblood Wagyu

Marblemax B901

Marblemax programTerminal marbling

Built to push IMF scores on terminal calves. When the pen goes to the plant, this is the sire you want on the paper.

Pedigree & bloodline

Selected out of the Marblemax program for one job: turning feed into intramuscular fat. His pedigree stacks marbling sires on the maternal side so the trait shows up in the first cross, not the fourth.

Registration No.

[Registration No. — from lineage papers]

Sire

[Sire name — from pedigree papers]

Dam

[Dam name — from pedigree papers]

Maternal Grandsire

[Maternal grandsire — from pedigree papers]

The breeding angle

Use Marblemax on calves that are going straight to the plant. He puts fat where the grader finds it — inside the ribeye — without slowing a terminal steer down.

Best fit: feeders and backgrounders chasing grid premiums on a short feeding window, or commercial herds that market everything at weaning and still want the Wagyu bump.

Request a quote for Marblemax B901

Request a quote

Pick your sire, get your price

Quotes come back within one business day with current EPD sheets and lineage papers for the sires you ask about. Straw pricing depends on volume — bundle with semen tanks and AI supplies if you need them.

Request a quote