/usr/include/Kokyu/ is in libkokyu-dev 6.0.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Kokyu/DSRT_CV_Dispatcher_Impl_T.cpp
/usr/include/Kokyu/DSRT_CV_Dispatcher_Impl_T.h
/usr/include/Kokyu/DSRT_Direct_Dispatcher_Impl_T.cpp
/usr/include/Kokyu/DSRT_Direct_Dispatcher_Impl_T.h
/usr/include/Kokyu/DSRT_Dispatch_Item_T.cpp
/usr/include/Kokyu/DSRT_Dispatch_Item_T.h
/usr/include/Kokyu/DSRT_Dispatch_Item_T.inl
/usr/include/Kokyu/DSRT_Dispatcher_Impl_T.cpp
/usr/include/Kokyu/DSRT_Dispatcher_Impl_T.h
/usr/include/Kokyu/DSRT_Dispatcher_Impl_T.inl
/usr/include/Kokyu/DSRT_Sched_Queue_T.cpp
/usr/include/Kokyu/DSRT_Sched_Queue_T.h
/usr/include/Kokyu/Default_Dispatcher_Impl.h
/usr/include/Kokyu/Default_Dispatcher_Impl.inl
/usr/include/Kokyu/Dispatch_Deferrer.h
/usr/include/Kokyu/Dispatcher_Impl.h
/usr/include/Kokyu/Dispatcher_Impl.inl
/usr/include/Kokyu/Dispatcher_Task.h
/usr/include/Kokyu/Dispatcher_Task.inl
/usr/include/Kokyu/Kokyu.h
/usr/include/Kokyu/Kokyu.inl
/usr/include/Kokyu/Kokyu_defs.h
/usr/include/Kokyu/Kokyu_defs.inl
/usr/include/Kokyu/Kokyu_dsrt.cpp
/usr/include/Kokyu/Kokyu_dsrt.h
/usr/include/Kokyu/Kokyu_dsrt.inl
/usr/include/Kokyu/kokyu_config.h
/usr/include/Kokyu/kokyu_export.h