12345To provide: a novel compound that inhibits Ax1 and is useful as a treatment for diseases caused by Ax1 hyperfunction as a treatment for diseases related to Ax1 hyperfunction and/or as a treatment for diseases involving Axl hyperfunction a salt of said compound or a crystal of said compound or salt. [Solution] Provided are: a pyridone derivative having a tetrahydropyranyl methyl group represented by formula (I) and having various substituent groups a salt of said derivative or a crystal of said derivative or salt (Herein R R R R R W X Y and Z in formula (I) are synonymous with the definitions in the description.).
