Rubuta ci gaba don wannan sakin layi - Bayan ritaya, Ishii ya zama kocin Kashima Antlers a 1999. Ya yi aiki ne a matsayin mai horar da jiki. A watan Yulin 2015, an kori kocin Toninho Cerezo kuma Ishii ya zama sabon kocin. Ya kasance manajan Japan na kulob din a karo na farko a cikin shekaru 21 tun bayan Masakatsu Miyamoto a 1994 (Ban da mai kula da Takashi Sekizuka a 1998 da 1999). A watan Oktoba, kulob din ya lashe kofin J.League na 2015. A shekarar 2016, kungiyar ta lashe gasar zakarun J1 kuma ta cancanci zuwa gasar cin kofin duniya ta 2016.
Ka yi haƙuri. An kuma zaɓe shi Manajan J.League na Shekara. A gasar cin kofin duniya, kulob din ya zama kungiyar Asiya ta farko da ta kai wasan karshe na gasar cin kofin duniya. A wasan karshe, bayan da aka buga wasa 2<unk>2 da zakarun Turai Real Madrid bayan minti 90, an doke su 4<unk>2 bayan karin lokaci. Duk da haka wasan kwaikwayon kulob din ba shi da kyau a shekara ta 2017, an kore shi a watan Mayu na 2017.