(education) elementary school, primary school

academy or non-university college (a post-secondary school not legally considered a university)

Kyūjitai form of 大学校 (“college, university”)

private school (US), public school (UK)

military academy, (especially) the Imperial Japanese Naval Academy

school supported by a pro-North Korean organization

school grammar / (specifically) Japanese school grammar, based on Shinkichi Hashimoto's work and now universally employed in Japanese schools and dictionaries.

shallow / superficial / frivolous / wretched / shameful

shallow

be new, it has not been long since, still in the early days of, not many days have passed since