Sentai Cafe Secret Base

Sentai Cafe Secret Base (戦隊カフェひみつきち, Sentai Kafe Himitsukichi) is a Super Sentai-themed cafe in Akihabara owned by Hakase Hiroyo that serves as the headquarters of the AkibaRangers.

Memorabilia

Entrance

• GingaiOh statue from Seijuu Sentai Gingaman
• One of the gashapon machines dispenses Ranger Keys from Kaizoku Sentai Gokaiger
• Denji Dog IC plush doll from Denshi Sentai Denjiman on one of the chairs by the entrance
• Mandora Boy from Mahou Sentai MagiRanger on one of the chairs by the entrance

Arsenal Wall

• Laser Magnum from Hikari Sentai Maskman
• Bird Blaster from Choujin Sentai Jetman
• Ranger Gun from Kyouryuu Sentai ZyuRanger
• King Stick from Chouriki Sentai OhRanger
• Auto Blaster from Gekisou Sentai CarRanger
• DX DinoBomber from Bakuryuu Sentai Abaranger
• Two D-Revolvers (one an actual TV prop, the other a smaller DX toy) from Tokusou Sentai DekaRanger
• Two Magi Sticks (one an actual TV prop, the other a smaller DX toy) from Mahou Sentai MagiRanger
• DX DualCrusher from GoGo Sentai Boukenger
• Geki Nunchuku from JyuKen Sentai GekiRanger
• Super Sentai 30th Anniversary vinyl figure set

Bar

• Poster and Red Falcon helmet from Choujuu Sentai Liveman on the right side
• Red Turbo helmet from Kousoku Sentai TurboRanger on the right side
• FiveRed helmet from Chikyuu Sentai Fiveman on the right side
• Boukenger briefcase from GoGo Sentai Boukenger

Bar Counter

• Zonnette statue from Gekisou Sentai CarRanger next to the telephone

Bookshelf

• Red Mask helmet, DX Great Five and DX Galaxy Robo box from Hikari Sentai Maskman
• DX OhRanger Robo and DX OhBlocker from Chouriki Sentai OhRanger
• 12" vinyl figures of GaoRed and GaoSilver from Hyakujuu Sentai Gaoranger
• DX Gourai Senpuujin (black version), DX Senpuujin and 12" vinyl figures of Hurricane Red, Kabuto Raiger and Kuwaga Raiger from Ninpuu Sentai Hurricaneger
• Kyouryuuya dinosaur cutout frame from Bakuryuu Sentai Abaranger hanging above the bookshelf
• DX AbarenOh and DX KillerOh from Bakuryuu Sentai Abaranger.
• DX Super Dekaranger Robo, Murphy K-9 and a 12" vinyl figure of Deka Red SWAT Mode from Tokusou Sentai DekaRanger
• DX MagiKing and DX SaintKaiser from Mahou Sentai Magiranger
• Go-Onger gas pump from Engine Sentai Go-Onger

Closet Door

• U.A.O.H. sign from Chouriki Sentai OhRanger
• Choujin Sentai Jetman mini-poster hiding the security keypad.

Cocktail Shelf

• DX Battle Fever Robo box from Battle Fever J
• DX Dyna Robo box from Kagaku Sentai Dynaman
• DX Bio Robo box from Choudenshi Bioman
• DX Change Robo box from Dengeki Sentai Changeman
• Poster, Red Flash helmet, DX Flash King box and DX Flash Titan box from Choushinsei Flashman
• Poster, TyrannoRanger helmet, DX DaiZyuZin and DX DragonCaesar from Kyouryuu Sentai ZyuRanger
• DX King Pyramider from Chouriki Sentai OhRanger
• DX DekaBase Robo from Tokusou Sentai DekaRanger
• DX Engine-Oh G12 from Engine Sentai Go-Onger

Computer Table

• "Digi Ken" sign from Denji Sentai MegaRanger
• Rin Jyuken Akugata triangular sculpture from JyuKen Sentai GekiRanger
• Go-Onger neon sign from Engine Sentai Go-Onger

Etiquette

The cafe's maids cosplay as female Super Sentai members in their signature civilian outfits, though Kozukozu has also cosplayed as the villain Sakura from Ninja Sentai KakuRanger and Kai from Mahou Sentai MagiRanger. They always address customers as "Red". Before the customers leave, the maids salute them and say, "Good job on your mission," then they say to Hakase, "Red is deploying."

Miscellaneous

In the episode 10 ending narration, Hakase reveals that the cafe has been in the red for the past few months, as the regular customers do nothing but spend all day chatting with each other without ordering anything. At one point, she set up a contest where a 10,000 yen present was to be awarded to anyone who could eat the cafe's special curry in less than 30 minutes; however, no one tried due to the 5,000 yen challenge fee.