power to erase memories of slump

stay depressed

sluggish sales

slack season〈米俗〉

poor economic performance

slumping economy

be mired in a slump

ailing economy

revitalize the ailing economy

fall into stagnation

sluggish domestic demand

inefficient industrial sector

sluggish year

There are quite a few new, energetic companies that are doing well in a sluggish Japanese economy.

dog days（商売などの）

Sales of digital musical instruments are going well in the stagnant musical instrument market.〔【出典】Catch a Wave, 2002年5月10日号◆【出版社】株式会社浜島書店 〕

ongoing depressed market

ongoing depressed economic climate

inefficient agricultural sector

underachieving children

lethargy

troubled industry

sluggish demand on（経済市場・地域など）

due to poor sales of

be attributed to sluggish sales of

slump in ~ sales

sluggish demand for

get anxious about someone's poor performance

decadelong economic slump

The auto industry that was a symbol of strength of the Japanese economy in the 1980s now has much financial difficulty, and a lot of carmakers had to become a subsidiary of foreign-owned corporations.〔【出典】『日本経済の秘密』（岸本建夫著）◆【出版社】株式会社ヤック企画 〕"YA01-087", "2474874"

This was due to the appreciation of the yen, which made export difficult and slowed domestic sales. Since then, Japan has been second behind the U.S. for total annual production. Recently, however, the situation has changed again due to the worldwide recession."A0000383", "2538351"

The Hanshin Tigers had several poor seasons before Hoshino became the manager in 2002.〔【出典】Catch a Wave, 2007年1月26日号◆【出版社】株式会社浜島書店 〕

Japan's economy shrank slightly in the fourth quarter of 2010, down three tenths of a percent, as domestic consumption slowed down."VOA-A248", "2387864"

Anita Doyle is a learning specialist who works with kids who are having academic troubles at the private Episcopal High School outside Washington D. C."VOA-S107", "2251771"

slumping information-technology sector

［1］ Refusing to receive, at the time that a counterparty tries to deliver them, goods that the counterparty has manufactured based on the enterprise's order, on the grounds that the goods are no longer required due to slack sales or due to renovation of the sales space or a change in the shelf arrangement.〔【出典】日本法令外国語訳データベースシステム 〕

［4］ Delivering an order of payment that is difficult for a general financial institution to discount by the due date, such as an order of payment drawn by a company with poor performance, including a negative net worth, or an order of payment that is substantially long-sighted, and thereby causing the counterparty to bear discount fees that are higher than usual.〔【出典】日本法令外国語訳データベースシステム 〕

The Hobbit has already been on hold for three years due to serious financial problems at its second backing studio, MGM."MB004467", "2466722"

Sufferers get symptoms like lethargy, lack of sleep and loss of appetite.〔【出典】『これが分かれば日本通』（田仲邦子著）◆【出版社】株式会社ヤック企画 〕"YA03-091", "2457286"

remain in the doldrums

In this stage, the Japanese film industry slumped and the tremendous decrease in audiences became a serious problem.〔【出典】『日本のスーパーヒーロー伝説』（ルー・ウェイ著）◆【出版社】株式会社ヤック企画 〕"YA04-030", "2368372"

Furthermore, he's suffering quite badly from chronic insomnia, lack of appetite and lack of exercise due to all these problems.〔【出典】Hiragana Times, 2000年11月号◆【出版社】株式会社ヤック企画 〕"HT169027", "2303593"