Perkins International Value Fund | Class A, C, S, I, N, T Shares

FUND SUMMARY

Perkins International Value Fund

INVESTMENT OBJECTIVE

Perkins International Value Fund seeks capital appreciation.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. Each share class has different expenses, but represents an investment in the same Fund.

For Class A Shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or in other Janus mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial professional and in the “Purchases” section on page 26 of the Fund’s Prospectus and in the “Purchases” section on page 52 of the Fund’s Statement of Additional Information.

SHAREHOLDER FEES
(fees paid directly from your investment)

Shareholder Fees Perkins International Value Fund Class A, C, S, I, N, T Shares	Class A	Class C	Class S	Class I	Class N	Class T
Shareholder Fees Column [Text]	Class A	Class C	Class S	Class I	Class N	Class T
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	5.75%	none	none	none	none	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of original purchase price or redemption proceeds)	none	1.00%	none	none	none	none

ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Perkins International Value Fund Class A, C, S, I, N, T Shares		Class A	Class C	Class S	Class I	Class N	Class T
Operating Expenses Column [Text]		Class A	Class C	Class S	Class I	Class N	Class T
Management Fees		0.80%	0.80%	0.80%	0.80%	0.80%	0.80%
Distribution/Service (12b-1) Fees		0.25%	1.00%	0.25%	none	none	none
Other Expenses	[1]	3.61%	3.48%	3.66%	3.49%	3.41%	3.66%
Total Annual Fund Operating Expenses	[2]	4.66%	5.28%	4.71%	4.29%	4.21%	4.46%
Fee Waiver	[2]	3.19%	3.21%	3.17%	3.19%	3.17%	3.17%
Total Annual Fund Operating Expenses After Fee Waiver	[2]	1.47%	2.07%	1.54%	1.10%	1.04%	1.29%

EXAMPLE:

The following Example is based on expenses without waivers. The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 in the Fund for the time periods indicated and reinvest all dividends and distributions. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses without waivers or recoupments (if applicable) remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

If Shares are redeemed:

Expense Example Perkins International Value Fund Class A, C, S, I, N, T Shares (USD $)	Expense Example, By Year, Column [Text]	1 Year	3 Years
Class A	Class A Shares	1,015	1,899
Class C	Class C Shares	627	1,577
Class S	Class S Shares	472	1,419
Class I	Class I Shares	431	1,301
Class N	Class N Shares	423	1,278
Class T	Class T Shares	447	1,349

If Shares are not redeemed:

Expense Example, No Redemption Perkins International Value Fund Class A, C, S, I, N, T Shares (USD $)	Expense Example, No Redemption, By Year, Column [Text]	1 Year	3 Years
Class A	Class A Shares	1,015	1,899
Class C	Class C Shares	527	1,577
Class S	Class S Shares	472	1,419
Class I	Class I Shares	431	1,301
Class N	Class N Shares	423	1,278
Class T	Class T Shares	447	1,349

Portfolio Turnover:

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance.

PRINCIPAL INVESTMENT STRATEGIES

The Fund pursues its investment objective by investing primarily in common stocks of companies of any size located outside of the United States, including in emerging markets. The Fund normally invests in issuers from several different countries, but under unusual circumstances, may invest in a single country. The Fund may also invest in non-U.S. debt securities. In addition, when the portfolio managers believe that market conditions are unfavorable for investing, or when they are otherwise unable to locate attractive investment opportunities, the Fund’s cash or similar investments may increase.

The Fund focuses on companies that have fallen out of favor with the market or that appear to be temporarily misunderstood by the investment community. The Fund’s portfolio managers generally look for companies with:

• strong balance sheets and solid recurring free cash flows
• attractive relative and absolute valuation ratios or that have underperformed recently
• favorable reward to risk characteristics

PRINCIPAL INVESTMENT RISKS

The biggest risk is that the Fund’s returns will vary, and you could lose money. The Fund is designed for long-term investors seeking an equity portfolio, including common stocks. Common stocks tend to be more volatile than many other investment choices.

Foreign Exposure Risk. The Fund normally has significant exposure to foreign markets as a result of its investments in foreign securities, including investments in emerging markets, which can be more volatile than the U.S. markets. As a result, its returns and net asset value may be affected to a large degree by fluctuations in currency exchange rates or political or economic conditions in a particular country. In some foreign markets, there may not be protection against failure by other parties to complete transactions. It may not be possible for the Fund to repatriate capital, dividends, interest, and other income from a particular country or governmental entity. In addition, a market swing in one or more countries or regions where the Fund has invested a significant amount of its assets may have a greater effect on the Fund’s performance than it would in a more geographically diversified portfolio. To the extent the Fund invests in foreign debt securities, such investments are sensitive to changes in interest rates. The Fund’s investments in emerging market countries may involve risks greater than, or in addition to, the risks of investing in more developed countries.

Emerging Markets Risk. The risks of foreign investing mentioned above are heightened when investing in emerging markets. Emerging markets securities involve a number of additional risks, which may result from less government supervision and regulation of business and industry practices (including the potential lack of strict finance and accounting controls and standards), stock exchanges, brokers, and listed companies, making these investments potentially more volatile in price and less liquid than investments in developed securities markets, resulting in greater risk to investors. There is a risk in developing countries that a future economic or political crisis could lead to price controls, forced mergers of companies, expropriation or confiscatory taxation, imposition or enforcement of foreign ownership limits, seizure, nationalization, or creation of government monopolies, any of which may have a detrimental effect on the Fund’s investments. In addition, the Fund’s investments may be denominated in foreign currencies and therefore, changes in the value of a country’s currency compared to the U.S. dollar may affect the value of the Fund’s investments. To the extent that the Fund invests a significant portion of its assets in the securities of issuers in or companies of a single country or region, it is more likely to be impacted by events or conditions affecting that country or region, which could have a negative impact on the Fund’s performance.

Value Investing Risk. Because different types of stocks tend to shift in and out of favor depending on market and economic conditions, “value” stocks may perform differently than other types of stocks and from the market as a whole, and can continue to be undervalued by the market for long periods of time. It is also possible that a value stock will never appreciate to the extent expected by the Fund’s portfolio managers. When the Fund’s investments in cash or similar investments increase due to a lack of favorable investment opportunities or other extraordinary factors, the Fund may not participate in market advances or declines to the same extent that it would if the Fund had been fully invested.

Market Risk. The value of the Fund’s portfolio may decrease if the value of an individual company or security, or multiple companies or securities, in the portfolio decreases or if the portfolio managers’ belief about a company’s intrinsic worth is incorrect. Further, regardless of how well individual companies or securities perform, the value of the Fund’s portfolio could also decrease if there are deteriorating economic or market conditions. It is important to understand that the value of your investment may fall, sometimes sharply, in response to changes in the market, and you could lose money.

An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

PERFORMANCE INFORMATION

The Fund does not have a full calendar year of operations. Performance information for certain periods will be included in the Fund’s first annual and/or semiannual report.

[1] Since the Fund is new, Other Expenses are based on the estimated annualized expenses that the Fund expects to incur in its initial fiscal year.

[2] Janus Capital has contractually agreed to waive the Fund's total annual fund operating expenses (excluding the distribution and shareholder servicing fees - applicable to Class A Shares, Class C Shares, and Class S Shares; administrative services fees payable pursuant to the Transfer Agency Agreement; brokerage commissions; interest; dividends; taxes; acquired fund fees and expenses; and extraordinary expenses) to 0.98% until at least February 1, 2015. The contractual waiver may be terminated or modified prior to this date only at the discretion of the Board of Trustees. For a period of three years subsequent to the Fund's commencement of operations (April 1, 2013), Janus Capital may recover from the Fund fees and expenses previously waived or reimbursed, which could then be considered a deferral, if the Fund's expense ratio, including recovered expenses, falls below the expense limit.