I need to think about how I present the next part of the build. Many things are built in parallel, few of them complete.
The superstructure can be divided roughly into five sections, these are:
Forward superstructure (bridge / main mast)
Funnel
MG platform
Aft superstructure
Aft mast and crane
One can refer to Foute_Man's ship plan for their rough location. Also, World of Warship's Ibuki model can be viewed in here, a very nice reference
Ibuki - 3D model by maxromash (@max_romash) [2aff298] - Sketchfab
The funnel is almost complete, so I can share the progress in one go. If I am correct, Ibuki had ten boiler rooms. Their funnel is grouped in a 4-2-4 arrangement, the four forward boilers are located directly under the bridge, the bridge is built around the opening on the deck, and the main mast sits across the base of the funnel there. The model unfolds the funnel structure in a very unfriendly way, after multiple complaints by me and the other testbuilder, CV12 decided to modify the design for the published version. I'm stuck with the test version however, and I had to say there are visible issues with my build.
The good news is, the build doesn't stop at the paper part. Japanese funnels have multiple levels of handrails all around it. I used (a lot of) photo-etched handrails to add this level of detail. Each boiler room also has a small steam vent next to the main funnel, these are made with 0.5mm copper wire. Inside each funnel opening, I added layers of paper stripes as rainstops. I managed to find a square grid PE sheet, which made a perfect meshwork on the funnel opening. There is also a ladder along the fore end of the funnel, as well as the accompanying handrail. The construction is spread over almost two months, but right now the funnel is more or less complete.