*) Public announcements and educating the Japanese people how fatal it is for the Japanese economy without immigration (In reality it is not). Which the Japanese government isn't even trying.
Last year Shinzo Abe said in a Reuters news conference that Japan will replace humans with artificial intelligence, wireless sensors and automation (Which is actually happening in parts of Japan).
*) Spending more on making signs and other informative pieces foreign friendly, by having English and other languages such as Korean or Chinese. Which is rarely done and outside of Tokyo it is even rarer.
This is only done for places which are frequented by tourists. Tourist spots and tourist hotels.
*) Teaching cultural differences in schools and teaching languages such as Chinese or Korean for better understanding.
I am born to a Japanese father and a Chinese mother I lived in the States through out my child hood till I came back to Japan and attended a Japanese high school. I am surprised to see that Japanese high school students suck at English also my brother (Now a junior school student) who was born after our family came to Japan, he also doesn't know anything about different cultures or languages apart from Japanese and some English due to our family up bringing.
*) By making it easier for foreigners to find jobs and changing visa categories.
Japan isn't changing any of these, most people aren't conscious about this but almost all visa categories are in temporary basis and are only limited in renewals and Japanese authority seize the visa and put into the holders detention and deport them if the holders have violated the rules, if Japan is planning to do something like you said wouldn't it be easier for them to turn a blind eye on issues like these, just like the European countries are doing ?.
Deportation has sky rocketed and the Japanese authorities have deported about 7,000 people in the first half of the year 2016 (Jan 2016 - July 2016).
Also tourists who have violated visa regulations are severely punished by either prohibiting future entry into the country or by fines, which is designed to discourage tourists who are overstaying. And tourists who are found gone missing are subjected for an immediate deportation.
Japanese manufacturing plants are actually moving out of the country to countries with cheaper labour and excessive supply, countries like China and Vietnam are notable, and home companies are targeting overseas customers now by penetrating into different countries so that companies will be more profitable and competitive than operating in just one country. The pace of this happening is so fast that in just 5 or 6 years the demand for foreign trainees and others who come to Japan for work related reasons will shrink to a level that the remaining visa categories (work related) will also be wiped out.
What Japan needs is actually highly skilled foreign workers whom are actually fewer than 1,500. But recent attraction of Chinese will make this figure rise but it will not be anything notable.
So NO! Japan is gonna take the automation/robots for tertiary sector route like it did in the late 90's with automation/robots for secondary sector.