From time to time on forums someone will ask for a recommendation for what type of line to use to make the connection loop for attaching a homemade taper line to the lillian.
Tapered line attachment loop:
This type of girth hitch knot I usually see called a chichiwa knot in Japanese. [ チチワ結び ].
Usually I recommend some kind of thin diameter braided fishing line. Today by chance I noticed Fujinoline sells a line dedicated for making the chichiwa loop. That Fujinoline calls - テンカラ専用取りつけ糸, [tenkara sen’yō toritsuke-ito], tenkara dedicated mounting/attaching thread (ito).
This line is described as being made from “polyarylate” [ 素材：ポリアリレート ].
Commercial grades of polyarylate fiber are available under the trade names : Vectran, Vectra, and Zenite LCP (liquid crystal polymers).
Many of these types of lines can be found at tackle shops. These fibers are called self lubricating. Probably desirable property on a reel, but for taper line use I’ve found that a line that isn’t slick holds better.
The level line sliding loop knot:
We are all familiar with various ways of tying this knot. As long as I have been doing tenkara, I don’t think I have noticed before the common Japanese name for this knot. Though the name has been there in plain sight.
I see two names, that are essentially the same, only a slight variation in one name.
投げな結び [ nagena musubi] Throwing knot. nagena knot.
投げ縄結び [ nage nawa musubi ] Lasso or literal translation - throwing rope knot.
The second name is right there in the title of this Honda video:
基本の結び方 CHAPTER 2 投げ縄結び - tying basics Chapter 2 nage nawa musubi
Which is my preferred way of tying this knot. The extra stop knot helps prevent the knot pulling out or becoming jammed.
You can find variations with an internet search for 投げ結びとは. what is throwing knot.
The “to ha”, (とは) suffix bit - is a short hand way of asking " (subject) what is".
チチワ結びとは - what is chichiwa knot.
テンカラロッドの穂先糸結びとは - what is tenkara rod tip ito knot.
ドライフライテンカラとは - what is dry fly tenkara
水面直下をテンカラ釣りとは - what is under water surface tenkara fishing
and so on.
Many methods and knot names can be found here:
釣り初心者向け 糸の結び方（総合） For fishing beginners ito knot how-to (general)
チチワ結びの場合 - in case of chichiwa knot
投げな結びの場合 - in case of throwing knot
Just a bit of name doodling.