This paper extracts the characteristics of the view of ability in educational practices during the period of rapid growth in Japan, focusing on the influence of these perceptions on the Ministry of Education's educational policies. The analysis draws on the debate about "vocational aptitude tests" and "observation guidance." Teachers' critical perceptions of "vocational aptitude tests" and "observation guidance" depend on their views of desirable ability. The main findings obtained are as follows. Since the 1990s, attention has been focused on non-cognitive ability; a similar view of ability (expansion of the view of ability) can be seen in educational practices in the 1960s. However, this expansion of the view of ability does not only appear in educational practices. According to the analysis of "ability and aptitude, etc." included in a reference document on observation guidance (presented by MoE, based on the French observation curriculum), an expansion of the view of ability can also be confirmed to be present in educational policy. The view of ability in educational practices may even coincide with that in educational policies.