Which ships would Japan replace after a hypothetical 1929 war?

What would Japan build to replace ships lost in the hypothetical war?

Improved destroyers would replace destroyer losses, while capital-ship replacements would depend on whether Japan accepted a new treaty or continued building outside it.

Replacement design depends on what Japan loses in the imagined war. A lost destroyer would probably be replaced by a better destroyer, while losses among carriers and battleships pose a different treaty problem. The joking loss of several old battleships opens a path toward new capital ships. A Yamato-like programme is conditional on Japan rejecting the London settlement to continue construction. Rejoining a modified agreement would create a different set of choices.