Due to renovation work at Umihotaru Parking Area
Notice of restrictions on use and relocation of some facilities

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NEXCO EAST Tokyo Wan Aqua-Line Expressway Management Office (Kisarazu City, Chiba Prefecture) and Trans-Tokyo Bay Highway Co. Ltd. (Shinagawa Ward, Tokyo) are carrying out renovation work to replace the aging stairs, escalators, and roof at the Umihotaru Parking Area (hereinafter referred to as "PA") on the CA Tokyo Wan Aqua-Line Expressway (hereinafter referred to as "Aqua-Line"). The work will be carried out in stages, alternating construction locations, over a long period until spring 2027.
Due to construction work, there will be restrictions on the use of the large parking lot on the first floor of the PA (In-bound lane), the stairs and escalators on the first to fifth floors, and some of the corridors on the fourth and fifth floors from September 2025 to late January 2026.
We apologize for any inconvenience this may cause our customers, and we appreciate your understanding and cooperation.

1. period

• The period may vary depending on the construction situation.
• We will provide separate notice regarding construction plans after January 2026.

2. Scope of impact

1. Some parking spaces in the large parking lot on the first floor (In-bound lane) are unavailable.
   • If the In-bound side is full, we will direct you to the large parking lot on Out-bound side.
2. The bus stop and motorcycle parking space have been relocated.
3. 1階～3階の下りエスカレーター・階段半分（南側）および4階～5階の階段は終日ご利用できません。
   • Please use the elevator or indoor stairs.
4. 3階～5階のエスカレーター、3階～4階の階段および4階、5階の通路は平日夜間（22:00～翌7:00）のみご利用できません。
   • Please use the elevator or indoor stairs.

(1) Some parking spaces in the large parking lot on the first floor (In-bound lane) are unavailable.

• Please note that this is a different route from the normal route.
• If the large parking lot on In-bound lanes is full, we will direct you to the large parking lot on Out-bound lanes.
  In that case, please follow the instructions of the guides.
• The period of usage restrictions may be changed depending on the progress of construction.

(2) The bus stop and motorcycle parking space have been relocated.

（3）1階～3階の下りエスカレーター・階段半分（南側）および4階～5階の階段は終日ご利用できません。
（4）3階～5階のエスカレーター、3階～4階の階段、および4階、5階の通路は平日夜間（22:00～翌7:00）のみご利用できません。

【海ほたるPA　1階～5階】

[Umihotaru PA 5th floor]

3. Overview of the renovation work

At PA, the aging stairs, escalators and roof will be completely renovated.
The roof will have a membrane roof structure, transforming the space into one with an open feel.

Schedule