In 1953, Toyonobu was born to parents who owned a grocery store in Tokyo.
His grandfather was a Japanese-style painting artist.
Although his grandfather passed away when he was 3, he still remembers playing with his art materials.
When he was 15, he participated in Salon de Jeudi - an exhibition led by professional painters - which let him to become interested in oil painting for the first time.
He became a grocery store owner after turning 20; however, nothing had stopped him from oil painting.
From the year 1978-1980, he joined "Setsu-Mode Seminar", a design school in Tokyo, where he learned the combination of colors.
He has exhibited his works at Salon de Jeudi's group exhibitions more than 50 times since the 1980’s.
His painting won a prize in Setagaya-City-Art-Exhibition two years in a row in 2009 and 2010.
He held a solo exhibition in Tokyo seven times between 2013-2016 and presented his oil paintings.
He started presenting his works on the internet from 2009 as well.
In 2015, he made his decision to live as an artist, so he quit working for the grocery store. He applied and got accepted to join the Japan Artists' Association, Inc. in 2016.
His painting technique is to use only a palette knife, which makes his paintings vivid and lively, which is also known as "matiere".