There is no hard requirement that natsume must be displayed on tana. It is perfectly fine to have a diagonal hishaku with futaoki on the lower half with no natsume on the upper half. (ref glenn)
There is no hard requirement that natsume must be displayed on tana. It is perfectly fine to have a diagonal hishaku with futaoki on the lower half with no natsume on the upper half. (ref glenn)