Tokyu 3000 series

Seating is longitudinal bench seating throughout.^[2] Wheelchair spaces are provided in cars 2 and 5.^[3]

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  Interior view
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  Priority seating
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  A wheelchair space
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  LED passenger information display

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  Driver's cab, March 2009
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  Partition behind the driver's cab

The first 3000 series set, 3001, entered service in 1999, initially as an eight-car formation used on the Tokyu Toyoko Line.^[2] This was subsequently reformed as a six-car set following delivery of the rest of the fleet destined for the Meguro Line.^[2] A total of 13 six-car sets (78 vehicles) were built by 2001.^[2]

On 26 March 2019, Tokyu Corporation announced that the entire Meguro Line fleet, including the 3000 series fleet, would be lengthened from six cars to eight cars from the first half of fiscal 2022.^[4] Six of the additional cars were completed in late March 2022 and transported to Nagatsuta depot. As of February 2023, all sets have been lengthened to eight cars.^{[5][additional citation(s) needed]} The new cars are based on the design of the 5000 series,^[6] thus featuring several external and internal differences from the original 3000 series cars.^[7]

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  Original 8-car set 3001 on the Tokyu Toyoko Line in April 1999
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  6-car set 3001 on the Toei Mita Line in September 2020

On 8 May 2025, Tokyu Corporation announced its plans to refurbish its 3000 series fleet, as well as 23 Toyoko Line 5050 series 8-car sets and 18 Den-en-toshi Line 5000 series sets. Refurbished sets will carry a new livery and a redesigned interior based on that of the 2020 series, with new walls, seats, and flooring as well as additional wheelchair spaces.^[8] The first refurbished 3000 series set is scheduled to return to service on 2 October 2025.^[9]

Set 3112 was refurbished in August 2025 and is planned to re-enter service in Fall 2025.^{[10][unreliable source?]}