The Onigirazu - Salmon (鮭おにぎらず) is onigirazu with grilled salted salmon (shiojake).
It sits within the Pocket Sandwiches family of French sandwiches — specifically the The Onigirazu cluster, which gathers the regional and stylistic variants that share its frame.
For the broader The Onigirazu tradition that frames this sandwich, see The Onigirazu.