The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Eater reported in December 2017 that the Mira Mesa location was "Scheduled to launch by mid-2018". It opened later than that: Menya Ultra's[3] own company timeline records "October 26: Opened 14th Ramen shop in Mira Mesa, San Diego, California", and the restaurant's own announcement set "Grand opening is 10/26" after soft openings on 22 and 23 October. The pin takes the grand opening.
The MICHELIN Guide inspectors reviewed Menya Ultra[3] for the 2026 Guide USA: a Guide selection rather than a starred restaurant, at the $$ band and flagged "Worth Queueing For", with the verdict that the house tonkotsu is "a rich, porky tonkotsu enhanced with miso" and the tantanmen "a unique take on Sichuan dan dan noodles". The entry covers the Clairemont Mesa flagship, not this Mira Mesa branch, so it is cited for the brand's critical standing rather than for this opening.
The company's own site, whose timeline states "October 26: Opened 14th Ramen shop in Mira Mesa, San Diego, California" and lists the Mira Mesa address - the primary source for the opening date the pin uses instead of Eater's[1] mid-2018 target.
Local trade coverage published a week ahead that quotes the restaurant's own announcement in full - the 10:45am ceremony on 22 October, soft openings on 22-23 October and "Grand opening is 10/26" - plus Endo's 1994 Akita first shop and the Zimmern tweet.[1]
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