Gasasshiyar ciyawa wani nau'in abinci ne mai inganci.Musamman a Japan, Koriya ta Kudu, Kudu maso Gabashin Asiya da Hong Kong, mutane da yawa sukan ci gasasshen ciyawa.Musamman ma, Koreans da Jafananci suna ba da hankali ga ƙwanƙwasa don tonic na jiki a lokacin rani, kuma suna la'akari da illolin a matsayin daya daga cikin mafi kyawun abinci ga tonic na namiji.Yawancin jafanan jafanan sun fi kayan yaji da gasassu.Yawan cin gasasshen gasasshen shekara-shekara ya kai tan 100000 ~ 120000.An ce kusan kashi 80 cikin 100 na goro ana sha ne a lokacin rani, musamman a lokacin bukin cin duri a watan Yuli.A zamanin yau, mutane da yawa a kasar Sin ma sun fara dandana gasasshen gasasshen.Ba abinci ne mai zafi da bushewa ba.Don haka, cin abinci mai gina jiki a cikin kwanakin zafi na zafi yana iya ciyar da jiki, rage zafi da gajiya, hana asarar nauyi a lokacin rani, da cimma manufar ciyarwa da dacewa.Ba abin mamaki ba ne Jafananci suna son eel a matsayin tonic lokacin rani.Kayayyakin cikin gida sun yi karanci, kuma sai an shigo da su da yawa daga kasar Sin da sauran wurare a duk shekara.