2026.09.21 2026.09.22

Japanese PE Line Sizes Explained: gō Numbers, Leader Pairings and a Full Chart

minagiman

If you have ever bought Japanese braid and wondered why the spool says PE 1.5 instead of a pound rating, this page is the answer – and the chart below is the one I actually use when I spool up.

Contents

First, the thing that confuses everyone
PE braid and shock leader pairing chart
Why you need a leader at all
How long should the leader be?
Fluorocarbon or nylon?
Which knot to learn
Worked examples
Common questions
Read next

First, the thing that confuses everyone

The gō (号) number is a thickness unit, not a strength unit. It comes from the traditional Japanese line-sizing system and describes diameter, not breaking strain. Two braids both labelled PE 1.5 can have noticeably different lb ratings depending on how many strands they use and how tightly they are woven. So use the gō number to choose a line that fits your reel and your guides, and read the lb figure printed on the box for strength. Never assume a conversion.

Leaders are sized the same way, which is why a Japanese leader spool carries both a gō number and a lb figure. That part is more consistent, which is what makes the chart below usable.

PE braid and shock leader pairing chart

PE (gō)	Leader (gō)	Leader (lb)	Class	Typical use
0.06	0.6-0.8	2-2.5	Light game	Single jighead ajing (light horse mackerel)
0.08	0.6-0.8	2-3	Light game	Single jighead ajing
0.1	0.6-0.8	2-4	Light game	Ajing, mebaring (rockfish)
0.2	0.8-1	3-4	Light game	Ajing, mebaring
0.3	1-1.2	4-5	Light game	Ajing, mebaring
0.4	1-1.5	5-6	Light game	Float and Carolina rigs, chinu (black seabream), light squid jigging
0.5	1.5-2	6-8	Light game	Float and Carolina rigs, chinu, light squid jigging
0.6	2-2.5	8-10	Mid game	Chinu, seabass, squid jigging (eging), super-light shore jigging, tai-rubber
0.8	2.5-3	10-12	Mid game	Chinu, seabass, eging, SLS (small yellowtail), tai-rubber, flatfish
1.0	3-4	12-16	Mid game	Chinu, seabass, eging, SLS, tai-rubber, rockfish, flatfish
1.2	4-5	16-20	Light shore	Chinu, seabass, tai-rubber, rockfish, flatfish, light shore jigging (small to mid pelagics)
1.5	5-8	20-25	Light shore	Big seabass, hirasuzuki, rockfish, flatfish, light shore jigging
2.0	8-10	30-35	Light shore	Hirasuzuki, big rockfish, light shore jigging
2.5	10-12	35-40	Big game	Hirasuzuki, big rockfish, shore jigging
3.0	12-14	40-50	Big game	Shore jigging, shore plugging, mid to large pelagics
4.0	14-16	50-60	Big game	Shore jigging, shore plugging, large pelagics
5.0	16-20	60-70	Big game	Shore jigging and plugging, hiramasa and kanpachi, tuna, offshore casting
6.0	20-24	70-80	Big game	Shore jigging and plugging, large amberjack, tuna, offshore casting
8.0	24-32	80-100	Big game	Offshore casting, GT, bluefin, marlin, kue (grouper)
10.0	32-40	100-130	Big game	Offshore casting, GT, bluefin, marlin, large grouper

Read it as a starting point rather than a rule. If you fish clean sand you can go lighter; if you fish rock you go heavier.

Why you need a leader at all

Braid has almost no stretch, so a leader absorbs the shock of a hit and of a fish thrashing at the net.
Braid has poor abrasion resistance. Rock, shell, gill plates and the sand itself will cut it.
Braid is visible and hangs stiffly. A length of clear mono or fluorocarbon in front of the lure looks more natural.
A leader gives you something to grab when you land a fish, instead of pulling on braid that will cut your hand.

How long should the leader be?

Situation	Leader length
Surf, sand, few snags	About one hiro (roughly 1.5 m – one arm span)
Seabass, river mouths and harbours	1 to 1.5 m
Rocky shores, tetrapods, heavy structure	2 to 3 m
Squid jigging (eging)	1 to 1.5 m
Ajing and mebaring	30 cm to 1 m
Shore jigging for large pelagics	1.5 to 2 m

The practical limit is your rod. A leader long enough that the knot sits inside the guides at the start of the cast will cost you distance and, in the dark, will eventually cost you a cast. Longer is safer for abrasion, shorter is easier to fish.

Fluorocarbon or nylon?

	Fluorocarbon	Nylon
Abrasion resistance	Strong	Average
Stretch	Low (better feel)	High (absorbs shock)
Density	Heavy, sinks	Light, tends to float
Price	Higher	Lower
Suppleness	Stiff	Supple and easy to knot

For most shore lure fishing I use fluorocarbon, because the ground is what kills leaders. Nylon makes sense when you want a lure to stay high in the water, when you are fishing topwater, or when you want the extra stretch on a short rod at close range.

Which knot to learn

The FG knot is the standard in Japan and it is worth learning, because it is thin, it passes the guides cleanly and it holds. But the honest version of this advice is: learn one knot you can tie in the dark, in wind, with cold hands. A knot you can tie in forty seconds on the beach beats a knot you can only tie at home. Carry a spare spool with line already joined, and if the tide is going off, re-tie with something simple and keep fishing.

Worked examples

Surf flatfish, 30-40 g lures: PE 1.0-1.2 with a 16-20 lb fluorocarbon leader, about 1.5 m.
Surf pelagics with metal jigs: PE 1.5-2.0 with 30-40 lb, 1.5-2 m.
Harbour seabass: PE 0.8-1.0 with 12-16 lb, around 1 m.
Squid jigging: PE 0.6-0.8 with 8-12 lb, 1-1.5 m.
Ajing with a single jighead: PE 0.2-0.3 with 3-5 lb, 30-50 cm.

Common questions

Can I just use a heavier leader to be safe?

Up to a point. Too heavy and the leader stops the lure swimming properly, especially with small minnows and light jigheads, and the knot gets bulky enough to catch in the guides. The pairing in the chart exists to keep the knot small and the lure alive.

Why do Japanese anglers use such thin braid?

Distance. On a beach, thinner braid means more casting range and less bow in the line when there is wind or current, and both of those matter more than raw strength when the drag is set correctly.

My leader keeps breaking at the knot.

Usually the knot was tied on braid that had already been damaged. Cut back a metre of braid before re-tying – the last stretch has been through the guides a thousand times.