Irwin's influence[3] led directly to Miyashiro's major works of the early 1960s, wall-mounted small-scale assemblages consisting of found objects and dark, thick paint.
[5] The postwar period at Chouinard was a high point for the institution, which became a seedbed for abstract expressionist practice in California, a key context for Miyashiro's work in the early 1960s.
In 1988, he was featured in Lost and Found in California : Four Decades of Assemblage Art, published in conjunction with a series of exhibitions organized by James Corcoran Gallery in Santa Monica.
[11] In 2010, Miyashiro participated in "circa 1962," a two-person show at Cardwell Jimmerson gallery in Culver City in 2010, alongside the work of Jim Eller.
Art in Black Los Angeles 1960-1980" at UCLA's Hammer Museum[13] alongside works by Noah Purifoy, John Outterbridge, Melvin Edwards, Betye Saar, Charles White as well as other non-African American artists including Mark di Suvero, Sheila Levrant de Bretteville, Gordon Wagner and others.