You mean e-signatures? Which is what I use in my office whenever we sign documents around here?
I'm sure Japan knows about e-signatures. The problem is that of "culture" perhaps? I'm not entirely convinced that this stamp-thing is a bad thing for Japanese culture, or that this is an issue that needs "fixing".
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But "if it does need fixing" (and again, I don't think I agree with that mindset...), e-signatures are readily available and easily done in Adobe-PDF readers, backed up by public/private key infrastructure given out by your company's smartcard system (or whatever).
A number of government regulations still require hankos, which is one of the reasons e-signatures aren't more heavily used. The government has been aiming for digitalization, and part of that is eliminating regulations that require hankos, so e-signatures have been becoming more usable lately.
Hanko culture, however, is harder to kill off. Part of that is things like more senior employees having larger hankos, needing to tilt your hanko signature to "bow" to your managers, etc. Japanese E-signature platforms generally have seals, and offer features to change the size of the seal, and to rotate it, to support the cultural aspects of hanko culture.
