I recently bought a Nissin Fine Mode 450 to use for bass online at Ebay from a dealer in Japan. This is a stiff Keiryu rod, meaning that it is tip action. Then, attempting to a different rod, some confusion arose and to resolve my selection the dealer sent a copy of the Nissin chart for the Fine Mode.
There are three action for each length of rod and typically what is sold online is the stiffest. The Japanese adverts call this “tone.”
I bought a softer action, listed as a “445” for $62,23 and it’s at the post office, having taken about a week to arrive; but I’m self-sequestered and haven’t picked it up, as yet. You could probably buy spare parts to ship with the rod or, perhaps at this price, even buy a spare rod.
I’ll let you know what I think of it after casting it in the backyard swimming pool.