Furukawa, K. JACoW Publishing Geneva, Switzerland 978-3-95450-216-5 10.18429/JACoW-eeFACT2018-TUPAB01 English 121-125 TUPAB01 injection linac operation controls luminosity Contribution to a conference proceedings 2019 2019-04 https://doi.org/10.18429/JACoW-eeFACT2018-TUPAB01 http://jacow.org/eefact2018/papers/tupab01.pdf The e⁻/e⁺ SuperKEKB collider is now under commissioning. As e⁻/e⁺ beam injection for SuperKEKB greatly depends on the efforts during the previous KEKB project, the injection developments during KEKB are outlined as well as the improvements towards SuperKEKB. When KEKB was commissioned, approximately ten experimental runs per day were performed with e⁻/e⁺ injections in between. As another collider PEP-II had a powerful injector SLAC, the KEKB injector had to make a few improvements seriously, such as injection of two bunches in a pulse, continuous injection scheme, eventual simultaneous top-up injections, as well as many operational optimizations. The design of SuperKEKB further required the beam quality improvements especially in the lower beam emittance for the nano-beam scheme, as well as in the beam current for the higher ring stored current and the shorter lifetime.