Kiten can deinflect verbs you search for. To enable this, make sure you have enabled the "builtin" dictionary for verb deinflection. Kiten will then deinflect Japanese you search for that starts with a Kanji and ends with a Kana.

The "Deinflect" option tries to unconjugate Japanese verbs. Deinflect only supports the common verb conjugations. If you search a lot of Japanese text you might consider using this option until you get used to handling Japanese verb forms.