Mastro's Steakhouse - Costa Mesa
Costa Mesa, CA · Steakhouse
Dedicated Wagyu house
Tier 1 · Certified / Registry-Verified What the tiers mean
Wagyu from $240 on the menu we read
On the official Kobe Beef registry as No. 1328. See the U.S. Kobe list
This is not a halal restaurant. It prints a supplier brand carrying the word halal on one American Wagyu cut, which describes that product line and not the kitchen. The restaurant itself makes no halal claim, no certifier is named, and the kitchen also handles pork and alcohol. If you need halal, treat this as a sourcing detail rather than a place to eat.
How to check a halal claim →Why it's listed
Mastro's Costa Mesa lists A5 Kobe New York strip from Tajima cattle in Hyogo and Japanese A5 Wagyu from Miyazaki. The same location-specific menu also names Westholme Australian crossbred Wagyu and WinterFrost American Wagyu. The restaurant is listed in the official Kobe Beef registry as No. 1328.
Wagyu on the menu
- Japanese
- Brand / Prefecture
- Kobe Beef (Tajima cattle, Hyogo Prefecture)
- Grade
- A5
- Producer
- Not listed
- Japanese
- Brand / Prefecture
- Miyazaki Prefecture
- Grade
- A5
- Producer
- Not listed
- Australian
- Brand / Prefecture
- Westholme
- Grade
- Crossbred; no AUS-MEAT marbling score stated
- Producer
- Westholme
- American
- Brand / Prefecture
- WinterFrost
- Grade
- Not listed
- Producer
- WinterFrost
| Origin | Brand / Prefecture | Grade | Producer |
|---|---|---|---|
| Japanese | Kobe Beef (Tajima cattle, Hyogo Prefecture) | A5 | Not listed |
| Japanese | Miyazaki Prefecture | A5 | Not listed |
| Australian | Westholme | Crossbred; no AUS-MEAT marbling score stated | Westholme |
| American | WinterFrost | Not listed | WinterFrost |
Sourced from
Buy it online
Evidence on file
“Costa Mesa menu: A5 Kobe Beef, 100% Tajima cattle, Hyogo, New York 4 oz $240 or 6 oz $360; Japanese A5 Wagyu, Miyazaki.”
mastrosrestaurants.com “The location page identifies 633 Anton Blvd, current hours, Westholme Cross Cattle Australian Wagyu and WinterFrost Halal American Wagyu.”
mastrosrestaurants.com “Mastro's Steakhouse - Costa Mesa, Registration No. 1328, 633 Anton Blvd, Costa Mesa, listed as a restaurant.”
kobe-niku.jp
Quoted from the sources checked when this listing was verified.
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Common questions
- Does Mastro's Steakhouse - Costa Mesa serve real Wagyu?
- Yes, and it says where the beef comes from. Mastro's Steakhouse - Costa Mesa in Costa Mesa, CA publishes enough detail on its own materials to identify the Wagyu it sells, which is the standard this directory calls verified, last checked on July 25, 2026. That means a named Japanese brand or prefecture with its grade, an American breed status with a named producer, or an Australian producer with a marbling score.
- What kind of Wagyu does Mastro's Steakhouse - Costa Mesa serve?
- Its menu discloses Kobe Beef (Tajima cattle, Hyogo Prefecture) A5, Miyazaki Prefecture A5, Westholme Crossbred; no AUS-MEAT marbling score stated and WinterFrost. Each of those is taken from the venue's own current materials rather than from a review or a listing site, and the evidence behind it is quoted further down this page.
- Is the Wagyu at Mastro's Steakhouse - Costa Mesa Kobe beef?
- Yes, on both counts that matter. This venue appears on the official Kobe Beef Marketing and Distribution Promotion Association registry, and Kobe was on its verified menu when last checked on July 25, 2026. Both are required here: a registry listing alone is permission to buy Kobe, not proof that any is being served.
- How was Mastro's Steakhouse - Costa Mesa verified?
- By reading the venue's own current material, its menu, its site or its ordering system, and quoting the line that names the beef. Reviews, aggregator copies and press mentions are not accepted as the source, because they go stale silently. Verification is assisted by AI and every claim is stored with the page it came from, last confirmed on July 25, 2026.