Step one is to get them growing really strongly so they have excess energy that they can devote to back buds and/or interior branches. Once they are growing really strongly you can start to pinch back (Japanese White Pine, Scots, Mugo) or decandle (Japanese Black & Red Pines) to force the energy into the back and interior buds. The key during development is to get very strong growth so there is lots of sap flow along the stems and branches.
There is a good summary of information for most of these in the species guide section under education. Another good place to look is to search the forum. Here is a thread with comments on 3 of the 5 you have listed. Short-Needle Single-Flush Pines notes - Beginners - Mirai Forum (bonsaimirai.com). Finally, when searching the lives streams look for “short needle single flush” and “multi flush” pines along with variations of those terms. Some cover lots of development info while others are focused on refinement.