week. Keywords concerning the Fukushima NPP accident appeared clearly in this
ranking. This trend was strengthened according to time. On the other hand, Table 3
of Kahoku-Shinpo shows a different trend. For example, in week 2, “recovery”
appears in the second position of the ranking. Simultaneously, “Iwate,” “missing,”
and “whereabouts,” are ranked. This is a different character from the results of
Asahi-shimbun. Also in week 3, “tsunami” is ranked in the second position, higher
than “NPP.” The rank of “NPP” of Kahoku-Shinpo in week 3 is lower than the
result of Asahi-shimbun.
Figure 3 describes the co-word network from March 11 to March 17 (first week
after the 3.11), and from April 1 to April 7 (fourth week after the 3.11) of Asahishimbun. Clearly, we can find the difference of network structure among two
co-word networks. This means the degree of organization of topics. The co-word
network of the first week shows the confusion of topics and agendas in the aftermath. The organization of topics and agendas progressed according to time (see
Fig. 3). Furthermore, we can extract more implications from these co-word networks. The keyword cluster meaning “Earthquake and Tsunami” has a dense
network with keyword cluster meaning “NPP accident and electricity.” This means
that the topics on “Earthquake and Tsunami” and topics on “NPP accident and
electricity” were often connected in articles. This trend is seen in all co-word
networks of each week (data not shown).
On the other hand, Fig. 4 shows the co-word network of Kahoku-shimpo in the
first (March 12–March 18) and fourth week (April 2–April 8) after the 3.11. They
have some different characters from the co-word networks of Asahi-shimbun. One
of the features of Kahoku-shimpo is that there are relatively weaker connections
between “Earthquake and Tsunami” and “NPP accident” than others. We can find
this point from the result of the first week after the 3.11. The co-word of Asahishimbun in the fourth week showed clear co-word clusters on “Political development”
7 but on the other hand, “Medicine and human service” and “Support and aid
for disaster” appeared in Kahoku-shimpo at that time.
Fig. 3 Co-word map of Asahi-Shimbun (left week 1, right week 4)
7
At that time, nationwide local elections were conducted, and this theme attracted interests of
national media.
Deprivation of Media Attention by Fukushima Daiichi …
121
ranking. This trend was strengthened according to time. On the other hand, Table 3
of Kahoku-Shinpo shows a different trend. For example, in week 2, “recovery”
appears in the second position of the ranking. Simultaneously, “Iwate,” “missing,”
and “whereabouts,” are ranked. This is a different character from the results of
Asahi-shimbun. Also in week 3, “tsunami” is ranked in the second position, higher
than “NPP.” The rank of “NPP” of Kahoku-Shinpo in week 3 is lower than the
result of Asahi-shimbun.
Figure 3 describes the co-word network from March 11 to March 17 (first week
after the 3.11), and from April 1 to April 7 (fourth week after the 3.11) of Asahishimbun. Clearly, we can find the difference of network structure among two
co-word networks. This means the degree of organization of topics. The co-word
network of the first week shows the confusion of topics and agendas in the aftermath. The organization of topics and agendas progressed according to time (see
Fig. 3). Furthermore, we can extract more implications from these co-word networks. The keyword cluster meaning “Earthquake and Tsunami” has a dense
network with keyword cluster meaning “NPP accident and electricity.” This means
that the topics on “Earthquake and Tsunami” and topics on “NPP accident and
electricity” were often connected in articles. This trend is seen in all co-word
networks of each week (data not shown).
On the other hand, Fig. 4 shows the co-word network of Kahoku-shimpo in the
first (March 12–March 18) and fourth week (April 2–April 8) after the 3.11. They
have some different characters from the co-word networks of Asahi-shimbun. One
of the features of Kahoku-shimpo is that there are relatively weaker connections
between “Earthquake and Tsunami” and “NPP accident” than others. We can find
this point from the result of the first week after the 3.11. The co-word of Asahishimbun in the fourth week showed clear co-word clusters on “Political development”
7 but on the other hand, “Medicine and human service” and “Support and aid
for disaster” appeared in Kahoku-shimpo at that time.
Fig. 3 Co-word map of Asahi-Shimbun (left week 1, right week 4)
7
At that time, nationwide local elections were conducted, and this theme attracted interests of
national media.
Deprivation of Media Attention by Fukushima Daiichi …
121