It is not rare in Japan, because of its unique experience of atomic bombing, that researchers indicate the danger of even the slightest amount of radiation, and there have been cases where non-radioactive properties are being focused in recent promotions of anion-generating materials. However, X-rays are also a kind of radiation. If radiation is harmful, then X-ray technicians would all fall ill. There have also been releases of research data that suggest low-level radiation stimulates vitality and maintains good health (radiation hormesis). I stress, the fixed idea that even the slightest radiation should be avoided is wrong. It is feared because it cannot be visually recognized, perhaps. This document confirming the proportional existence of radiation and anions will still leave the argument which of the two is beneficial to our health, however, at all events, Nippon Kayaku's Kayacera, generating both radiation and anions, is certain to contribute to the maintenance of good health through the effects of both.