Eight days are rather long. Going out to Hakone could be lovely. But Hakone Kamakura Pass for only Enoshima/Kamakura is just costly. Tokyo Subway Ticket is OK. But the hotel in the subway area is expensive. Capsule hotels could be used, though.
http://www.odakyu.jp/english/deels/freepass/hakone_kamakura/http://www.tokyometro.jp/en/ticket/value/travel/Here is my trial for an extreme minimum. On the average, cherry blossom, Sakura, will be in full bloom on April 3 in Tokyo. The decline is faster. I would stay in Tokyo for eight nights from March 30 to April 6. Hotel prices in these period may reach a maximum. Hotel searches should be done by day by day. But I here used the whole period for an ease.
2900 3.6 Atsugi Capsule Hotel
3240 4.1 ON THE MARKS KAWASAKI
4012 3.3 Tokyo Kiba Hotel
4354 3.7 Hotel Hilltop / Narimasu
4372 3.4 AI Hotel Yokohama
4495 3.7 Yokohama Hostel Village
4791 3.5 Hotel Select Inn Isehara
5385 4.6 Tokyo Guest House Itabashi Juku
5433 4.0 Shonan Enoshima Seaside Guest House ANNEX
5458 3.7 Shonan Enoshima Seaside Guest House
5700 3.3 MaRRoaD Inn Hanno
5789 3.7 Business Inn New City / Yokohama
5983 3.5 Hotel Housen Soka
https://www.google.co.jp/maps/search/旅館/@35.3038304,139.4295692,13z
https://www.google.co.jp/maps/search/ホテル/@35.6601274,139.8976897,13z
https://www.google.co.jp/maps/search/ウィークリーマンション/@35.3258654,139.3677617,13z
Tokyo Guest House Itabashi Juku marks a high Google rating. But the price of ON THE MARKS KAWASAKI is outstanding with a rate larger than 4. Shonan Enoshima Seaside Guest House ANNEX also gets a rate of 4.0. But the difference is more than 2000 yen. Just commuting to Enoshima and Kawasaki from Kawasaki will be more economical.
Google Flights suggests one day earlier departure. I will follow it. Hotel search should be modified accordingly. But I skip it here. The arrival to an unknown city should be before sunset. But I here just take the lowest price.
76482 PRG 27 Mar 1435-28 Mar 1930 NRT 6 Apr 2230-7 Apr 1340 PRG
https://www.google.co.jp/flights/#search;f=PRG,XYG;t=HND,NRT,23K;d=201...28 Mar The arrival is close to the midnight. Just try to sleep.
1413 NRT 2039 - 2247 Kawasaki
https://world.jorudan.co.jp/mln/en/?p=0&from=Narita-Airport&to=Kawasak...29 Mar Asa-Teishoku (Breakfast) would cost around 300 yen either at Matsuya or Yoshinoya near JR Kawasaki.
https://tabelog.com/en/rstLst/?utf8=✓&maxLat=35.541583392908834...Here I prepared nine sets of daily itineraries. Three for Kanagawa and the rests for Tokyo. Do priotize them at first, but execute each depending on the body conditions, the weathers, and Sakura. The three for Kanagawa are Kamakura, Enoshima, and Yokohama.
Kanagawa 1: Yokohama
Kanagawa 2: East Kamakura
Kanagawa 3: West Kamakura + Enoshima
For Tokyo, I selected these with a consideration of Sakura.
Tokyo 1: Meguro River + Odaiba
Tokyo 2: Ueno Park + Ameyoko + Akihabara
Tokyo 3: Chidorigafuchi + Imperial Palace Graden + Ginza
Tokyo 4: Sumida Park + Asakusa + SkyTree
Tokyo 5: Inokashira Park + Ghibli + Shinjuku
Tokyo 6: Meiji Jingu + Harajuku + Shibuya
Here I describe these in this order.
Kanagawa 2: East Kamakura
Tokyo 6: Meiji Jingu + Harajuku + Shibuya
Tokyo 1: Meguro River + Odaiba
Tokyo 4: Sumida Park + Asakusa + SkyTree
Kanagawa 1: Yokohama
Tokyo 2: Ueno Park + Ameyoko + Akihabara
Tokyo 5: Inokashira Park + Ghibli + Shinjuku
Tokyo 3: Chidorigafuchi + Imperial Palace Graden + Ginza
Kanagawa 3: West Kamakura + Enoshima
550 Kawasaki 835-908 Kita-Kamakura
Try to do most of Kamakura. Finish at least the eastern half. Proceed to Tenen Trail, Hachimangu, and Komachi, then return to the hotel.
550 Kamakura 1936-2009 Kawasaki
30 Mar 390 Kawasaki 831-901 Yoyogi
Walk into Meiji Shrine from the north. Go out to Harajuku and walk around Harajuku and Omote Sando. Proceed to Shibuya, then go back to Kawasaki.
310 Shibuya 1932-2006 Kawasaki
31 Mar Start the other Tokyo sites with Sakura.
420 Kawasaki 831-(Mizonokuchi)-911 Ikejiri-Ohashi
Walk along Meguro River to Tennozu.
http://www.city.meguro.tokyo.jp/sakuramap/hp_MeguroSakura2017_en_ko_ch... 270 Tennozu Isle 1309-1315 Kokusai Tenjijo
Walk back to Odaiba along the Promenade, and enjoy Odaiba Marine Park.
630 Odaiba Kaihin Koen 1930-(Shinbashi)-2005 Kawasaki
1 Apr 490 Kawasaki 833-(Tamachi/Mita)-923 Oshiue
Tokyo Skytree, Tokyo Solamachi, Sumida Park, and Asakusa.
480 Asakusa 1931-(Kanda)-2018 Kawasaki
2 Apr 220 Kawasaki 831-844 Yokohama
Walk around Minatomirai, Yamashita Park, Motomachi, China Town and JR Yokohama.
220 Yokohama 1933-1946 Kawasaki
3 Apr 390 Kawasaki 831-903 Ueno
After spending the time in Ueno Park, proceed to Ameyoko, then to Akihabara.
390 Akihabara 1930-1959 Kawasaki
4 Apr 550 Kawasaki 831-(Tokyo)-924 Kichijoji
Walk around Ghibli Museum and Inokashira Park near Kichijoji, then Shinjuku in the return.
220 Kichijoji 1304-1316 Shinjuku
390 Shinjuku 1930-2005 Kawasaki
5 Apr 480 Kawasaki 833-(Yurakucho)-915 Kojimachi
Walk to Hanzomon, Chidorigafuchi, Imperial Palace Gardens, Otemachi, Tokyo, Nihonbashi, and Ginza.
310 Shimbashi 1938-1952 Kawasaki
6 Apr The 9th - last day. The day for Enoshima and the rest of Kamakura. Enoshima, beaches and Daibutsu trail from Hase to Kita-Kamakura.
780 Kawasaki 835-(Ofuna:Monorail)-924 Enoshima
260 Enoshima 1311-1329 Hase
550 Kita-Kamakura 1530-1610 Kawasaki
Pick up the luggage and proceed to Narita.
1413 Kawasaki 1717 - 1910 NRT
https://world.jorudan.co.jp/mln/en/?p=0&from=Kawasaki&to=Narita-Airpor...The total of the rail tickets becomes 11,676 yen. Adding the flights and the hotel, the total is 117,318 yen so far. Meals could be as low as 1300 yen (= 300 + 500 + 500). Ghibli is 1,000 yen. Ten temples and shrines could be 3,000 yen. I would do Osaisen (throwing a small money at a shrine) just once for an experience. Accounting meals for ten days, all the cost now reaches 134,318 yen. Meals with twice costs would be rather normal. So, 150,000 yen would be a more realistic minimum. Upgrading the other parts, a badget from 200,000 to 250,000 yen would be more reasonable.
https://www.japan-guide.com/e/e2410.htmlAs I said above, I prefer to arrrive at the first city in the daytime. Here is another idea.
88096 PRG Mar 28 705-Mar 29 1045 NRT Apr 6 1315-Apr 7 1120 PRG
I may choose this set of hotels.
5385 4.6 Tokyo Guest House Itabashi Juku
5433 4.0 Shonan Enoshima Seaside Guest House ANNEX
And the itinerary.
Mar 29 NRT-Yokohama-Enoshima
Mar 30 Kamakura/Enoshima
Mar 31 Enoshima-Shinjuku-Itabashi
Apr 1 Meguro River + Odaiba
Apr 2 Inokashira Park + Ghibli + Shibuya
Apr 3 SkyTree + Sumida Park + Asakusa + Akihabara
Apr 4 Chidorigafuchi + Imperial Palace Graden + Ginza
Apr 5 Ueno Park + Ameyoko + Meiji Jingu + Harajuku
Apr 6 Itabashi-NRT