Koishikawa Kōrakuen (小石川後楽園), 1-6-6 Kōraku, Bunkyō-ku (Located near Tokyo Dome, a few minutes from Iidabashi Station on the Toei Ōedo Line), . 9AM-5PM (last entry 4:30PM), closed Dec 29-Jan 1. Laid out in the 17th century, this splendid traditional garden boasts a large collection of trees and flowering plants that provide touches of beauty all year round. Winding paths, wooded hills, ponds teeming with ducks and fish. The place can be a little crowded at certain times of year (such as during the cherry blossom season in late March-mid April), but there's plenty of room for everyone.¥300. edit
Rikugien (六義園), Hon-Komagome 6-16-3 (3 min from Komagome stn, Yamanote/Namboku line). A classical Japanese park with ponds, hills and teahouses, originally built in 1695 by Yanagisawa Yoshiyasu, a Tokugawa daimyo. It's a popular cherry blossom spot in spring and is lit up at night at this time.¥300. edit
Kyu-Furukawa Teien (旧古川庭園), Nishigahara 1-chome (15 min from Rikugien along Hongo-dori). Probably Tokyo's best-preserved early Edo-era Western-style mansion, designed by English architect Josiah Condor. The rose garden here is also well-known and blooms twice a year in May-June and Oct-Nov, and there's a Japanese garden to round out the set.¥150. edit
Koishikawa Botanical Garden of the University of Tokyo (小石川植物園), Hakusan 3-7-1 (A bit of a walk from Hakusan subway station; Follow the signs). Not one of the great gardens of Japan and sometimes a bit shabby, but a pleasant stroll with interesting trees, an medicinal herb garden and several ponds. Not to be confused with Koishikawa Korakuen.edit
St. Mary's Cathedral (Tokyo Cathedral), . Seat of the Roman Catholic Archdiocese of Tokyo. Designed by the famous architect Tange Kenzō, this ultramodern church was built in the 1960s to replace an older structure that was destroyed during the war.edit
Bunkyo-ku Civic Center, (Korakuen station of the Marunouchi line). The lavish government building for the Bunkyo ward of Tokyo, once described in the Japan Times as "a colossal Pez candy dispenser." A free observation deck on the 25th floor, jutting out of the top like the Starship Enterprise, commands a fine view of much of Tokyo.Free. edit
Bunkyo ward is a nice place to walk, but it can be a tough stroll as this area is famous for a number of slopes. There being 433 slopes in Tokyo, as many as 173 of them are located in this ward. Some are named, and some are not. There stands a plate written its history on each slope. Even if you didn’t know anything about this area, it is fun to know its names. There are many unique names, such as Kaiun-zaka (Good luck slope), Yūrei-zaka (Ghost slope), or Ijin-zaka (Barbarian slope). You can look at these unique names on books, some of which only focus on the slopes.
A free PDF guide  containing several themed walking tours is available on the Bunkyō City website.
Tokyo Dome City is an attractions complex featuring a large indoor stadium, an amusement park, bowling alley, off-track betting center, and shoppingmall. Tokyo Dome is one of several Tokyo stadiums. It is home to the Yomiuri Giants baseball team and also hosts concerts, trade show events, and professional sports.
Baseball Hall of Fame and Museum, 1-3-61, Kōraku, Bunkyō-ku, Tōkyō 112-0004 (Entrance to the right of Tokyo Dome's Gate 21), . Mar-Sep 10AM-6PM, Oct-Feb 10AM-5PM, closed Mondays, closed Dec 29-Jan 1. Adults ¥500, seniors ¥300, children ¥200; discounts for groups of 20+. edit
The University of Tokyo (東京大学 Tōkyō daigaku, ), formerly the Imperial University and still Japan's supremely well-funded Harvard, Yale, and MIT all rolled into one, has its main Hongō campus in Bunkyo. Around 2000 foreign students study at the University, but competition for places can be fierce. The University of Tokyo also attracts many travelers as a place to look around and to have some food.
The Red Gate (赤門 Akamon) on the Hongo street was built in 1827, when a daughter of the then Shogun, Ienari Tokugawa, married the Daimyo who lived in the premises. Inside the gate are the General Library and the Graduate Schools of Economics, Literature, and Education. To the left side of the gate is the Communication Center which is actually a souvenir shop, and to the right side, there is the university museum. The grounds are sprinkled liberally with large, stately gingko trees, whose leaf can be found on the seal of the university.
At the center of the campus is the Japanese garden of Ikutoku-en (育徳園) — the Virtue-Teaching Garden — built around 1630 as the garden of
Maeda Toshitsune, one of the wealthiest daimyo in the Tokugawa era. At its center is Sanshiro Pond (三四郎池 Sanshiro-ike), in the shape of the Japanese character kokoro (心), meaning "heart" or "spirit". Both garden and pond are, regrettably, rather poorly kept.
To the north of the pond there is the auditorium, Yasuda Kodo which became a symbol of the student activism in 1968-69, when the building was occupied by students as a base facility for activities to change the University registration. In the basement floor there is a large-scale student canteen called Chuo Shokudo (central canteen), offering cheap if rather mediocre food, and a University Co-op where you can buy T-shirts and ball-point pens with the university logo.
To the east of the auditorium is the main building of the Graduate School of Science, where one of the largest photomultiplier tubes, which contributed to the Kamioka neutrino experiments, is exhibited.
The campus has around 20 places to eat, including Starbucks, Subway and several student canteens.
Capo Pellicano is at the 13rd floor of the main (tallest) building of the Graduate School of Medicine. Lunch menus are for around ¥900. The view of buildings in Shinjuku and Roppongi from the western side of the floor should not be missed.
The university also has the Koishikawa Botanical Garden in Hakusan.
The Toyo Bunko (東洋文庫), Honkomagome 2-28-21 (10 min from JR Komagome station). The Toyo Bunko is a special library and a research institute of Oriental studies. The research focuses on Asian history and cultures. The Toyo Bunko collects and saves historical records of Asia. The collection of books exceeds 950,000 items. People can read the books free of charge. Library materials cannot leave the building. Photocopiers are available for use at a minimal charge.edit
La Qua (ラクーア), Connected to Korakuen station (Marunouchi Line). La Qua is a new shopping mall with some attractions attached. It opened in 2003, replacing a section of the amusement park at Tokyo Dome City. There are boutiques, a grocery store, restaurants, a hairdresser, massage salon, and gym. In addition a roller coaster runs along the roof, and there are other amusement attractions including a water slide and a concert stage. Among all these, the main accommodation is the LaQua spa. Here you can take a spa bath, sit on a comfortable chair and do whatever you like. Note that it is cheaper to spend a night in here than in any hotel, however, people with tattoos are not allowed to enter.edit
Seijo Ishii. A large grocery store in La Qua, with many imported foods and wines. Many frozen products are sold in restaurant packs.edit
Fire House, Hongo 4-5-10 (From Hongo Sanchome station, Oedo or Marunouchi line, go to main intersection and look for roller coaster in distance. Go that direction, on right side of street; restaurant is before next traffic light), ☎ +81 03-3815-6044, . A popular hamburger restaurant decorated with American memorabilia.edit
Goenmon, Hon-Komagome 1-1-26 (Nearest station is Hakusan), ☎ +81 03-3811-2015. Serves tofu dishes in a traditional garden setting. Reservation required.edit
Hantei, Nezu 2-12-15 (From Nezu Station, exit 2, cross main street (Rte 437), and turn left. Restaurant is halfway down the block), ☎ +81 03-3828-1440. Serves kushiage (deep fried skewered food) in a rare old wooden building.edit
Komatuan (小松庵), Komagome 3-3-21 (5 min from JR Komagome station), ☎ +81 03-3917-2536, . 11AM-10PM. Obsessively perfectionist handmade soda noodles for connoisseurs, made using only buckwheat from a certain village in Hokkaido and rolled on the thighs of virgins — or at least that's what you'd expect from the price. Their famous sakurakiri soba, available only from Apr-Jun, has real cherry blossom's leaves mixed in. ¥1000-3000. edit
Nonki (呑気), 1-20-6 Mukōgaoka (near Tōdaimae station). Tokyo's longest-running oden (fish soup) shop, founded in the Meiji era and still going strong. The centerpiece of the small shop is a giant cauldron full of boiling oden goodness. Order with the phrase tekitō-ni to let the chef decide.Figure on ¥1000 for a serving and a beer to wash it down. edit
ALPES, 3-2-8 Komagome (1min from JR Komagome station), ☎ 03-3917-2627, . 10:00-20:00. Sells many kinds of cakes. And it has café space. The decoration of café is like classical hotel’s lobby. And ALPES is famous for butter cream. Most popular cake is a cream puff. edit
Hotel Kizankan, 4-37-20 Hongo (from Hongo-Sanchome subway stations, go down the small street between the koban--police box--and McDonalds), . This basic business hotel is convenient for those visiting Tokyo University. Minutes from the Hongo-Sanchome stations of the Oedo and Marunouchi subway lines, and close to the many small restaurants in front of the university. Little English is spoken, but foreigners are welcome.Singles from ¥7980, twins from ¥8925. edit
Forest Hongo Hotel, 6-16-4 Hongo, . A bit nicer (and more expensive) than the standard business hotel, this is a good choice for visitors to Tokyo University, but not convenient otherwise. Some English is spoken and the hotel hosts many foreign guests.Singles from ¥10,164, twins from ¥18,480. edit
Toyoko Inn Korakuen Bunkyokuyakusho-mae, (Nearest stations: Korakuen on the Namboku and Marunouchi Lines; Kasuga on the Oedo and Mita Lines), . Toyoko Inns are inexpensive business hotels, but have a good range of amenities. Their access maps are exceptionally clear, with an English version for you and Japanese for the taxi driver. This one is not near any tourist destinations but convenient to major subway lines.Singles, doubles and twins, all under ¥10,000. edit
Tokyo Dome Hotel, 1-3-61 Koraku (Nearest stations: Suidobashi on the JR and Mita Lines; Korakuen on the Marunouchi Line), ☎ +81 03-5805-2111, . This is an international hotel at competitive prices. Several restaurants, ranging from reasonable to very expensive.Doubles from ¥24,000. edit
Hotel Chinzanso Tokyo, 2-10-8 Sekiguchi (Nearest station: Edogawabashi), ☎ +81 3 3943-1111, . A flawless luxury hotel with prices to match. Location is a bit out of the way; expect to take taxis.Doubles from ¥55,000; the Imperial Suite is ten times as much. edit
This is a usable article. It has information for getting in as well as some complete entries for restaurants and hotels. An adventurous person could use this article, but please plunge forward and help it grow!