Genryu is the Japanese word for headwaters. Picture narrow canyons, high gradient streams, no roads and often, no room to cast. The fishing style is often lantern fishing, which is a very short line technique. The style is called lantern fishing because the long rod and very short line are reminiscent of the way lanterns were carried hundreds of years ago (the lantern was tied to a short line, which in turn was tied to the end of a long bamboo pole).
I think the Suntech Genryu Sawanobori is an excellent rod for Czech nymphing. Most of the rods I've had in stock that I've describe as good Czech nymphing rods have been either 3.3 or 3.6m rods. The extra length of the 4.5m Genryu Sawanobori is very welcome indeed.
Although the 4.5 meter Genryu Sawanobori is considerably longer than the other rods, it is still light enough to use with one hand. It weighs only 2.8 ounces without the tip cap. That's less than many 3.6m rods, let alone 4.5m rods. The 5.4 meter rod and the 6.3 meter rod are two-handers. Don't knock two-handed rods until you have tried one! You get the benefit of extra reach without the tip heaviness you feel if you try to hold a long rod with only one hand.
G. Sawanobori 45
Length extended 14'5"
Length collapsed 20 7/8"
Weight with tip cap 3.3 oz
Weight without cap 2.8 oz
Sections 10
Tip Diameter 1.0mm
Grip Diameter 24.8mm
Tippet rating 7X-5X*
% Carbon 99%
Pennies 54