Seeker is not a good choice for Japanese style jigging rod as they are strong ,but they are usually heavy.
Check Graphite USA or St Croix blanks.
And check GUSA Challlenger blanks. There are some 6' jigging blanks, but they are sold exclusively by
North East Rod Builders - Billy Vivona .
I checked one of the blanks and they are light and strong, and have pretty soft tip section compared with normal GUSA blanks.
I have a few custom jigging/popping rod out of OTI's blanks and I am pretty satisfied with their performance.
You also can buy Jigging Master blanks overseas.