In his track record, Yos never leaves social issues. In 1994, he raised environmental issue for his solo exhibition entitled “Bersatu Dengan Alam” at Taman Ismail Marzuki. In 2001, he held a solo exhibition with the theme “Barbarisme: Perjalanan Anak Bangsa” at the National Gallery of Indonesia showing his criticism towards the violence in the reality of contemporary nation. In 2005, he raised a social issue, a criticism of corruption in the elite bureaucracy, by holding a solo exhibition “Republik Udang” in Tembi Gallery, Yogyakarta. He further was also involved in a group exhibition “Mata Hati Demokrasi” in Surakarta Cultural Park in 2002. On This occasion, displaying 33 paintings, Yos raises a deep evaluation on the nation’s cultural journey, especially maritime culture.