I often make my works in the small hours.

When the work is a drawing, I will send it to my family by Mail and Line, however,

Last night, all of my family asked me,

"to stop it"

I asked the reason to them, they said

"The sound of smart-phone wakes me"

I was really surprised.

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Ebata: Why do all of you set the ringing tone, at the incoming Mail and Line ?"

Senior Daughter(SD):"It is just common".

Ebata:"No way! we, IT engineers have believed that E-mail has a merit of "the recipient can reply at their own convenience", so we have been trying to spread it.

I also had a wicked intention, "I do not reply to unpleasant e-mails" or "I want to ignore troublesome work".

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Wife: "We are doing work on the line, so the ringing sound is absolutely necessary"

Second daughter: "Ring tone setting is common sense"

I reluctantly agreed to stop using Mail and Line to my family at midnight.

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I have ever made my own e-mail agent (M2M (IoT system) using e-mail), so I complained that "I am feeling down, because the basic idea of e-mail seems to be trampled down", however,

SD:"any tool continues to develop beyond the intentions of the developers "

I was admonished by her.