A very nice kit , my first 1/350 scale one ...
about the kit , must say it is a Tamiya kit ...all fits nicely , instructions are very clear , and a wondefull booklet with a lot of info on this submarine and his story ... nicely detailed for the scale and you can build a very nice model OOB .
You have a samll base to depict one of the Aichi Seiran planes in detail with a small standing base ,
About my build , I choose to have two detailed kits from Tamiya , some PE for rails and torpedoes and one for 1/350 figures , all are nice and can bring a lot of detail .Also you can have the torpedoes that this sub used depicted in some sort of storage rack .
about this detailed PE , if you use it be aware to use the drill bit they advice : 0,4 diameter ...not so nice in the end if you use a large drill bit ! Also a lot of tiny PE to use in periscope and athenas , I choose to depict the submarine with all the detail , Periscopes up , diving rudders unfold , it is a pitty that you can't see inside the hangar to see the Seirans with the wings folded , but ...here are some photos , not the best build from me I admit and still a lot to learn , here it is my 3rd entry in this GB and I'm happy that I finished them all now :
Here is my building thread
http://intscalemodeller.com/viewtopic.php?f=330&t=10161
Hope that you like the result ,
I have always liked the idea of a submarine aircraft carrier. Great work with the P.E and the tiny Seiran really set off the rusty weathered hull perfectly 
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