Claim: Strike the Blood III has ten OVAs between December 19 and September 25.
Evidence: December 19, 2018 (2018-12-19) September 25, 2019 (2019-09-25) The third OVA series, produced by Connect and with returning director Hideyo Yamamoto, debuted on December 19, 2018, and concluded on September 29, 2019.