Investigation 2
The number of holdings of specific sports books of the ranked universities is shown in Table 2sports performance was ranked within the top 20 for that sport, the value is represented with a half-tone. For instance, while NSSU (Nippon Sport Science University) was ranked within top 20 in the case of its performance in Judo and had 15 Judo related books, Hosei University was not ranked within the top 20 and had only one Judo related book. The average number of holdings of ranked and non-ranked universities is also shown in Table 2. We can see that the former is larger than the latter except for in the case of Rugby (see Table 2).