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involved in two battles in 1570. The first battle was the “Battle of
Anegawa”. The big, dark purple nodes (key people) appear in the upper
cluster around Nobunaga because they were commanders or daimyo
6
who
fought directly for Nobunaga. The second conflict was the “Ishiyama
Hongan-ji War” against Nobunaga caused by a network of commanders
around Osaka, temples, and communities belonging to the Ikko, which
was a powerful faction of religious zealots. It evidently shows a
complicated cluster of people including some huge, dark purple nodes of
people at the bottom in 1570 in Figure 8.7 (a). Since this war continued for
over 10 years, this cluster and some of the key people appear over and
over again.
Figure 8.7 (b) illustrates the networks of people around ODA
Nobunaga in 1572, 1573, and 1574 from left to right. Some huge, dark
purple nodes of people are visible around Nobunaga in 1572. The reason
behind this is that some famous daimyo and commanders created an anti-
Nobunaga encircling network to counter Nobunaga around 1572. We can
recognize most of these nodes as key people in the anti-Nobunaga
encircling network. However, there are some other big notable nodes of
people such as UESUGI Kenshin and MOURI Terumoto
7
who did not
belong to the anti-Nobunaga network. It is difficult to conceive why these
nodes are so near to Nobunaga. One explanation is they formed an alliance
with or fought against him. It shows that the node of ASHIKAGA
Yoshiaki shrinks and becomes gray from 1573 to 1574. The historical
interpretation of this is that it occurs because ASHIKAGA Yoshiaki was
deposed as Shogun by Nobunaga, who brought the Ashikaga shogunate to
an end in 1573. Another example is that there is a huge cluster of people in
1573, and two big nodes (“AZAI” and “ASAKURA”) in the 1573 cluster
disappear in 1574. That is because there was a huge battle (Nobunaga vs
AZAI Nagamasa and ASAKURA Yoshikage
8
), after which the AZAI and
ASAKURA clans fell. Their nodes never appear after 1574.
7.2 Comparing Structures of “Battle” and “Gift” Networks
Figure 8.3 is an example of simultaneously visualizing two networks related
to different viewpoints, “battle” and “gift”, from 1550 to 1650. The “gift”
network is extracted by inputting keywords related to “gift”. TimeSlices at
6. The powerful territorial lords in pre-modern Japan
7. UESUGI Kenshin and MOURI Terumoto were two of the most powerful
daimyo
of the
Sengoku Jidai
8. AZAI Nagamasa and ASAKURA Yoshikage were Japanese
daimyo
of the
Sengoku Jidai
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