In the News from Japan column in the March/April 2021 issue [1], a brief introduction of the Ninth International Symposium on Electrical Insulating Material (ISEIM) was described. It was also described that the $Q(t)$ method developed by Prof. Tatsuo Takada of Tokyo City University had been introduced in a seminar taking place in the Ninth ISEIM. As mentioned in that column, the principle of the $Q(t)$ method itself is well known. However, this revisited method is very innovative and truly useful. Regarding this, although a measurement example of the $Q(t)$ method was briefly introduced in the above March/April issue, more examples are being introduced in detail in this issue and the next issue.

中文翻译：

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日本新闻

在2021年3月/4月号[1]的News from Japan专栏中，对第九届国际电绝缘材料研讨会（ISEIM）进行了简要介绍。还描述了$Q(t)$由东京城市大学的 Tatsuo Takada 教授开发的方法已在第九届 ISEIM 的研讨会上被介绍。如该专栏所述，$Q(t)$方法本身是众所周知的。但是，这种重新审视的方法非常具有创新性并且确实有用。关于这一点，虽然一个测量示例$Q(t)$ 方法在上面的三月/四月刊中简单介绍过，更多的例子在本期和下一期详细介绍。