Kyomusume Koku Tokouki

It is the year 1689 A.D., in the Edo period.
Our protagonist who lives in Osaka is drinking together with Gulliver who has stopped by for a visit.
He hits it off with Gulliver straight away, and decides to join him in his travels. However… they become adrift on a strange peninsula.
There they then encounter a huge, towering giant girl… ?!
Well that country turns out to be the country of Brobdingnag, where people are 12 times the size of normal humans!

[from DLsite English]