Kato was an intensely private person who was deeply interested in nature and as a result he especially loved the Botanical Gardens at Berkeley, and he spent many happy hours there. Arne Jensen writes:
Kato ay isang marubdob pribadong tao na noon ay mataimtim na interesado sa kalikasan at bilang isang resulta siya lalo na ang pag-ibig ang botaniko Gardens at Berkeley, at siya na oras na ginugol maraming masaya doon. Arne Jensen magsusulat: