Manreki is sweet potato shochu from Kagoshima.

Shochu is a type of Japanese liquor.

1.8L of Shochu has 355 gm of alcohol (25% by volume x 0.789), which would be 2485 calories.

They're made pretty much in the same way but shochu is stronger compared to sake (nihonshu in Japan) but less than other spirits like Japanese whisky.

Eat it, generally. Or drink it, in the form of sake and shochu.

The Chu-hi, which is essentially a slang term derived from Shochu Highball, is basically a way that Shochu manufacturers developed to drive sales of their product as it was declining many decades ago. It is a Highball cocktail made with Shochu, poured Iver ice with sparkling fruit juice, or fruit juice and soda added. It became so popular that many manufacturers began pre-packing it in cans and calling it Chuhai or Chu-Hi. These canned drinks in Japan (although not advertised as such) are often now based on cheap vodka or ethanol. So essentially, yep you can buy these in Melbourne, or pretty much anywhere where Vodka RTDs are sold.