The restaurant launched as a high-end Asian concept in late 2016, but quietly converted to its parent brand and has been hosting a Tonkotsu ‘ramen residency’ since January 2018.
A representative for Tonkotsu confirmed the group was leaving the site for good on 30 January, and all fixtures and fittings are being sold off.
Tonkotsu wrote on its Facebook page: “Sadly, all good things must come to an end. Our 1-year Tonkotsu Ramen Residency at Anzu St James's Market will be closing on Wednesday 30 January.
“Up for grabs are some of the restaurant's tables, light fittings, bar stools and other bits.”
Tonkotsu is the second operator to leave the £400m St James’ market development, which launched near Piccadilly Circus in 2016.
Salt Yard Group closed its Italian restaurant Veneta just over a year after opening at the scheme, admitting that though the location was ‘fabulous’ it was ‘not quite right’ for its concept.
The closure of Anzu will leave Tonkotsu with nine ramen restaurants in London, and one in Selfridges Birmingham.