Tasty is oishii in Japanese.
If you want to say that a food is tasty then say: Oishii desu. The last "u" is most often not pronounced. So it's more like oishii des.
If you want to say "This is tasty.", then say: Kore WA oishii desu.
Asked in English to Japanese
How do you say old Japanese illustrations in Japanese Thank you in advance?
To say old Japanese illustrations in Japanese, you say "Mukashi no Nihon no irasuto". ...