Last Updated：2025/11/22
(law) An activity that is so dangerous that any person engaging in it will be held strictly liable for harm caused by engaging in the activity, no matter what precautions were taken to prevent harm; common examples include using explosives, radiation, and poisonous chemicals, and handling wild animals.
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ultrahazardous activity
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Source Word
ultrahazardous activity
Noun
(law)
An
activity
that
is
so
dangerous
that
any
person
engaging
in
it
will
be
held
strictly
liable
for
harm
caused
by
engaging
in
the
activity,
no
matter
what
precautions
were
taken
to
prevent
harm;
common
examples
include
using
explosives,
radiation,
and
poisonous
chemicals,
and
handling
wild
animals.
Japanese Meaning
超危険な活動：極めて危険すぎるため、いかなる予防措置を講じても、その活動により生じた損害に対して厳格な責任が追及される行為。たとえば、爆発物、放射線、毒性化学物質の使用、野生動物の取り扱いなどが挙げられる。
Sense（1）
(law)
An
activity
that
is
so
dangerous
that
any
person
engaging
in
it
will
be
held
strictly
liable
for
harm
caused
by
engaging
in
the
activity,
no
matter
what
precautions
were
taken
to
prevent
harm;
common
examples
include
using
explosives,
radiation,
and
poisonous
chemicals,
and
handling
wild
animals.
（ plural ）
