There’s
apparently some misunderstanding out there that the Japanese government warned that
it would shoot down drones in the air Japanese defense identification zone
around the Senkaku Islands. Since the new Chinese ADIZ raises the chances of
some incident blowing up into a more serious clash, the following memo may be
of some interest to anyone who chances upon this blog.
First, the Japanese authorities were referring to territorial
air space, not just any "air defense [identification] zone(s)." In
fact, the western part of Yonakuni Island, an undisputed (and well-inhabited)
part of Okinawa had not been included in any Japanese ADIZ until the latter was
expanded during the very recent DPJ administration. Most of the Japanese and
Chinese ADIZs cover non-territorial air space, where aircraft are in principle
free to traverse. On the other hand, all international air flight requires
reporting to the proper international authorities. I do not know the details of
this requirement, but sovereign states have access to this flight information,
which means that all normal civilian flights in the new ADIZ (or any
non-territorial airspace in any ADIZs for that matter) will continue unmolested
by the Japanese or Chinese military. Of course any unreported aircraft--which
likely will include most Japanese and Chinese aircraft in the area--will be
subjected to proper scrutiny, i.e. demand for self-identification, warnings and
the like, and ultimately attacked in self-defense in the case where there is an
clear and present danger--a decision that may be made with regard to the
non-territorial airspace within the ADIZ. It is unlikely that a JSDAF fighter
will shoot down a Chinese drone/aircraft in the ADIZ or even in Senkaku Islands
airspace just because the latter is recalcitrant or unable to identify itself.
A Chinese PLA aircraft may be more gung-ho, though, and may decide to attack a
JSDAF or Japanese Coast Guard aircraft that happens to fly over the new Chinese
ADIZ, territorial air space in particular. (The Japanese authorities do not, to
the best of my knowledge, have drones in operation in that neighborhood.) Far
more likely, though, is that a Chinese pilot might close in on a JSDAF or JCG
aircraft as a form of warning (or just to put a scare into the Japanese) and
cause an accident. (Remember the Hainan Island Incident.)
My second caveat is that the Japanese authorities did not
explicitly state that they would use weapons. It was in response to a
hypothetical that the Chinese authorities directly and somewhat belligerently
addressed the matter. The relevant comments from Japanese defense minister at
the Sept. 10 press conference, when he addressed the matter in response to
questions from the media, follow:
" Question:
Based on the current Self Defense Forces Act, my understanding
is that necessary measures can be taken in order to make aircraft invading
Japan's territorial airspace withdraw. However, in the theoretical case in
which an unmanned aircraft invades Japan's territorial airspace and it is left
alone, the situation may threaten the sovereignty of Japan and the lives and
assets of Japanese people. Under such circumstances, do you think shooting the
aircraft down can be an option as a last resort?
"Minister:
In any case, we will take necessary actions in order to defend
Japan's territorial land, sea and airspace as well as protecting lives and
assets of the people."
and
"Question:
Concerning countermeasures against invasion of Japan's
territorial airspace, not only by an unmanned aircraft but in any form, I
presume that necessary countermeasures exclude the use of weapons that can harm
the invaders, unless they are used for emergency evacuation or self-defense
based on the conventional interpretation. When you said earlier, "We will
take necessary actions," did you mean that the use of weapons that are
harmful to the invaders is one of the options, too?
"Minister:
I will refrain from answering about each specific
countermeasure, since doing so may reveal Japan's strategies. In any case, we
will take necessary measures."