Posted 3 years ago
These were designed by Toshichi Iwata and possibly made by him, although all were in their line of studio products. That basically means any glass blower at the studio could have made these to Toshichi's design.
The three handkerchief style are very typical of Iwata in the 50s/60s. The smaller heavy cased bowl is later I think.
I have seen these in a number of bright colours.