Synthesis of molecules with large, curved π-systems attracts much interest, because of high expectations to deepen our understanding of nanocarbons. Many "nanocarbon molecules" are being synthesized via elaborate synthesis. However, due to challenging nature of the synthesis, the methods tend to be one-off and specific for one molecule. Herein we show our recent explorations of a versatile synthetic method adopting "phenine", which covers various shapes of large nanocarbon molecules. Synthesis of gigantic, 7-kDa nanocarbon molecules, defective nanotubes, bowls, saddles and hemispheres will be shown at the presentation.