葛[Tsuzura] : General name for wild vine plants; wicker basket
藤[Fuji] : Wisteria; vine
The color of the vine is green. Green is also usually referred to as blue. With this vine, baskets called つづら[Tsuzura] are made. These are the origin of its name. The Tsuzura large and small appear in the traditional fable called 舌切り雀[Shita-kiri suzume](The Tongue-Cut Sparrow.)
https://en.wikipedia.org/wiki/Shita-kiri_Suzume
https://commons.wikimedia.org/wiki/File:Yoshitoshi_The_Heavy_Basket.jpg
The reading Tsuzurafuji is a kun-yomi(Japanese reading.) Reading this as kattō in on-yomi(Chinese reading,) it means a wandering mind or conflict. This means that complex or difficult to resolve situations are likened to the way vines tangle with each other.
常盤|常磐[Tokiwa] : Something that will never change; evergreen
山査子[Sanzashi] : Hawthorn(Crataegus cuneata)
It is native from South Europe east to West Asia. In general, it is more often called ピラカンサ[Pirakansa](Pyracantha) than its name.
In addition to 常盤 and 常磐, Tokiwa also has the kanji 常葉, which means evergreen. 常 means always, 葉 means leaf. This plant so named because it is an evergreen tree similar to Sanzashi, which is a deciduous tree. It produces small five-petaled flowers in spring.
Both of these berries are poisonous, but wild birds eat them.