How about deeply learning Japan's history before fixing your travel plan?
Japan has many temples and shrines and battlefields and castle places here and there. These are strongly connected with unique origin of reason why they built or was born.
Around 30,000 years ago, the ice age finally finished and mild temperature brought warmth to glacier and melted away. Then see level has been risen by this.
After this event Japan lslands which separated from large continent was born.
And forest was spreading and flourishing for nurturing animals and plants.
In this Jomon age, people lived by procuring food from rich sea and river and forest.
In the age of ending of Jomon period, rice cultivation techniques have been brought from China to Kyusyu region and in the begin of Yayoi period transmitted to Tohoku region.
People were making a paddy field for planting seeds of rice. They used stone knife to collect rice then stock in the raised-floor wharehouse.
People ate rice after boiling.
In this Kofun era, in Japan islands many Kofun (Emperor grave) has built.
The number of mounting grave was 16,000.
The Kofun is the grave to mount soil for emperor.
Sometimes embelished by Haniwa doll (埴輪) in a row.
People in Asuka period foamed the rule of politics which based on current Japan politics and the document-base control of Japan administration has begun.
In this period timemanagement, issuing money, contry name of Japan permmited for use.
And in the first city of Fujiwara palace, Japan the built basement of rule of law.
聖武天皇(Shomu emperor) who has will to stablize contry by the power of the buddhism in 平城京 (Heijyo Palace) relocatedin 710 built 国分寺(Kokubun Temple) and built up great budda.
And then 遣唐使 (Japanese envoy) brought China culture and things to Japan.
Japan's 天平文化 (Tenpyo culture) had very flourished.
On the otherhand, remained and old Fujiwara Palace was turned into a paddy feild.
The center of the city has turned in Heian Palace. Nobility mainly control the government in this age. Especially Fujiwara family give his daughter to emperor as a wife, then Fujiwara family had big power to control Japan.
However, in the end of Heian period, 平氏 (Heishi) and 源氏 (Genji) appreared as warrior (Japanese called 武士).
源頼朝 (Minamotono Yoritomo) who beat 平氏 (Heishi) opened Shogunate in Kamakura. After this, warrior actually control Japan's politics.
And then in the next period of 室町時代 (Muromachi), gradually Japan enter into the battle age representated famous warrior such as 織田信長 (Oda Nobunaga) who united finally Japan all.
豊臣秀吉 (Toyotomi Hideyoshi) united Japan in spite of 織田信長 (Oda Nobunaga) during long confused battle age. and after the death of 秀吉 (Hideyoshi), 徳川家康(Tokugawa Ieyasu) opened Edo Shogunate. Ieyasu beat 石田三成 (Ishida Mtsunari) in the battle of 関ケ原 (Sekigahara).
As a result, till Meiji period, peacefull Edo kept going on in 260 years.