Mastro's - San Francisco
San Francisco, CA · Steakhouse
Tier 2 · Provenance-Transparent What the tiers mean
On the official Kobe Beef registry as No. 1110, listed there as “Mastro's San Francisco”. 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 Steakhouse on Geary Street runs a multi-origin Wagyu program. Its San Francisco dinner menu offers Japanese A5 from Miyazaki Prefecture, Australian Westholme cross-cattle Wagyu, and American WinterFrost (Halal) Wagyu, alongside Wagyu carpaccio, meatballs, and a Wagyu roll. The venue is licensed by the Kobe Beef Association, but its current San Francisco menu does not list a Kobe cut, so it is shown as licensed rather than serving Kobe today. The named prefecture and grade on the Miyazaki cut put it among the directory's provenance-transparent listings.
Wagyu on the menu
- Japanese
- Brand / Prefecture
- Miyazaki
- Grade
- A5
- Producer
- Not listed
- Australian
- Brand / Prefecture
- Westholme
- Grade
- Not listed
- Producer
- Westholme Cross Cattle
- American
- Brand / Prefecture
- WinterFrost (Halal)
- Grade
- Not listed
- Producer
- WinterFrost American Wagyu
| Origin | Brand / Prefecture | Grade | Producer |
|---|---|---|---|
| Japanese | Miyazaki | A5 | Not listed |
| Australian | Westholme | Not listed | Westholme Cross Cattle |
| American | WinterFrost (Halal) | Not listed | WinterFrost American Wagyu |
Sourced from
Buy it online
Evidence on file
“<h2>Japanese A5 Wagyu</h2> Miyazaki Prefecture ... <h2>Australian Wagyu</h2> Westholme Cross Cattle ... <h2>American Wagyu</h2> WinterFrost Halal (San Francisco location page, dinner-menu-masf tab; no Kobe/Tajima/Hyogo present)”
mastrosrestaurants.com “<h2>A5 Kobe Beef</h2> 100% Tajima Cattle - Hyogo Prefecture / New York 4oz -- this Kobe section sits on the dinner-menu-MAWD document, a different Mastro's location, not the San Francisco (MASF) menu”
mastrosrestaurants.com “Mastro's San Francisco Registration No.1110”
kobe-niku.jp
Quoted from the sources checked when this listing was verified.
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Common questions
- Does Mastro's - San Francisco serve real Wagyu?
- Yes, and it says where the beef comes from. Mastro's - San Francisco in San Francisco, 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 22, 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 - San Francisco serve?
- Its menu discloses Miyazaki A5, Westholme and WinterFrost (Halal). 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 - San Francisco Kobe beef?
- It is licensed to serve Kobe and was not listing it when we last looked, on July 22, 2026. This venue does appear on the official Kobe registry, but Kobe was not on the menu at that check, so no Kobe badge is shown. Licensed rooms drop it between allocations and bring it back, so this can change without notice and is worth asking about directly.
- How was Mastro's - San Francisco 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 22, 2026.
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