 1365 is the year in which the Kakawin Nagarakretagama was completed, while 1389 is the year in which King Hayam Wuruk died.Kakawin Sutasoma was written after Kakawin Nagarakretagama.As well as authoring the Kakawin Sutasoma, Tantular is also known to have written Kakawin Arjunawiwaha.